Jessica Biel may not be calling Lynn Harless “Mom” yet – but already Justin Timberlake’s girlfriend and mother have formed a mutual admiration society.

“I love Lynn,” Biel told PEOPLE at Wednesday’s New York premiere of Summit on the Summit: Kilimanjaro, a documentary following her recent climb of Africa’s highest peak. “Lynn is the most wonderful woman. I am so in love with her.”

Less than a month ago, Harless was the one singing Biel’s praises. From her front-row seat at the William Rast fashion show during New York Fashion Week, she told PEOPLE: “She’s amazing. She’s so down-to-earth and her family is great.”

Harless’s esteem for her son’s girlfriend shot to a new level in December, when Biel borrowed her treadmill to train for her Kilimanjaro climb, in which the celebrity participants helped local villagers decontaminate their water. “She was at my house around Christmas and there was this crazy noise coming from my gym,” Harless said. “[She] had the treadmill to the highest level and was running with a 40 lb. backpack. I want to be her when I grow up!”

Biel, 27, said her training helped, though she had to focus on her breathing at such a high altitude when she was actually on the mountain. “I really had to take it slow because the second I started to get impatient or feel like let’s just go already, I would get nauseated or my head would start to pound,” she said. “You really had to respect the process of the mountain.”

Added her trainer, Jason Walsh: “If she feels good, she performs better.” Walsh has been working with Biel for 4 years, and started training Timberlake about 18 months ago. “Everybody would be surprised by how athletic Justin is,” Walsh said. “He’s really strong, has a good mentality – works hard.”

Justin Timberlake definitely supports his lady.

He’s doing a special introduction on MTV for Jessica Biel’s latest project, a 90-minute documentary airing Sunday on her Summit on the Summit climb of Mt. Kilimanjaro to raise awareness of the global water crisis.

But is she as supportive of Justin’s latest project, the movie Bad Teacher, in which he plays the love interest to his former girlfriend Cameron Diaz? They even have a hot romp in a hotel room.

Let’s just say Jessica may be up for girlfriend of the year, and it’s only March.

“I haven’t read the script, but I think it sounds fantastic,” she tells E! News during a screening at the Tribeca Grand Hotel of the Summit on the Summit doc. “It sounds like it will be so funny. Obviously, I’m superexcited for him.”

After we picked our jaws up off the floor, the couple’s good friend and trainer Jason Walsh explained her fortitude

“There’s confidence in the relationship and respect and honesty and communication,” he says. “It’s rare in this world—and especially in Hollywood—that you see that and it’s kind of beautiful. I respect that a lot.”

But that doesn’t mean Jess doesn’t have a competitive streak.

“I try not to pay attention to it, but you can’t help but laugh about how Jess will try not to show that she’s being competitive,” Jason says of the couple’s group workout habits. “She is competitive as hell, especially if there’s a guy in the room. Girls, she’ll lay back. But guys, she’ll bring it up a little bit.”

After reaching the peak of Mount Kilimanjaro, Jessica Biel has set her sights on a new challenge — a little mountain called Everest.

“I would love to trek to an Everest base camp,” the actress, 28, told UsMagazine.com at the premiere of Summit on the Summit, a 90-minute documentary about a crew who climbed 19,340 feet to raise awareness about the global clean water crisis, in New York City Wednesday.

Although she says the Everest trek is her “next goal,” it’s actually less intense than her six-day trek with fellow actors and musicians in January because the point she hopes to reach stands at 17,000 feet — 2,000 less than the summit of Kilimanjaro.

“I feel like I could handle that a lot better for a longer period of time, so that’s my next expedition,” she tells Us.

The hardest part about these climbs, she says, wasn’t the physical challenges.

“It was really mental,” she says of her Kilimanjaro climb. The key, she adds, is “to not let your brain play a trick on you — to keep motivated — to keep inspired even when you’re feeling nauseous and your head hurts and you’re uncomfortable thinking, ‘What am I doing here? This is crazy? This is really, really hard!’”

So, has she been able to show off her physical fitness gains during joint training sessions with beau Justin Timberlake?

“No,” she tells Us, laughing. “We really enjoy our workouts… It’s not a competition.”

She says their personal trainer, Jason Walsh, “is amazing” and “does such a good job keeping us motivated.”

A premiere party for Summit on the Summit: Kilimanjaro was held tonight in New York City, and Jessica and CO. went to the party! Jessica looks gorgeous in a flower printed dress and blazer.  She was also quoted by MTV saying:

“She was like this mysterious, foreboding, ominous woman. And she was hidden almost all day long, and just when you were unmotivated, and feeling like crap and uninspired and thinking, ‘What am I doing here?’ the clouds would part and she would peek out, and the beauty would strike you, and then you’d be inspired again,” Biel told MTV News on the red carpet for the premiere of “Summit.” “And she was literally, like, this woman who would pull this veil over her face and disappear, and then she’d show a little bit of herself, and then she’d disappear again. It was kind of this running joke, but I really felt that way. I felt like, ‘I respect you. Please let me get up, please.‘ “

Yesterday, Jessica and Co were on CNN’s “Larry King Live” to promote the upcoming MTV documentary, Summit on the Summit! Jessica looked beautiful as she discussed how and why she did the climb – I’ve embedded a video and have also added screen caps!

Enjoy!

Planet 51 is now available for purchase on DVD and Blu-Ray! This hilarious animated family film stars Dwayne Johnson, Jessica Biel, Jason Long, and Gary Oldman! If you haven’t seen the film yet, be sure to check it out!

Lem is just an average teenager working on getting the girl and furthering his career at the local planetarium – except that he’s an alien. At least to U.S. astronaut Captain Charles T. Baker who lands on Lem’s planet hoping for a quick flag plant and a hasty return to earth and his millions of screaming fans. But on this alien planet the media has tagged spacemen as brain-eating, zombie-creating monsters, causing Baker to run for his life and into Lem’s house. Now it’s up to the green native to get the clumsy astronaut back to his spaceship before military dictator General Grawl and mad scientist Professor Kipple manage to exterminate the Earthly visitor.

Special Features:
Exclusive Fun “Run Rover Run” Game!
Planetarium – The Voice Stars of Planet 51
Extended Scenes
The World of Planet 51 – Explore the Sights and Sounds of Planet 51
Life On Planet 51 – Behind-the-Scenes Featurette
Music Video Montage
Animation Progression Reels

I will add screen captures of Jessica later today!

Want to look like Jessica Biel in a bikini?

“Jessica is in great shape. She maintains her body and doesn’t necessarily have to train every day,” Gold’s Gym’s Ramona Braganza, who trained her for The A-Team, tells UsMagazine.com of the actress, 28, who was named “Best Abs” in UsMagazine.com and Gold’s Gym’s first ever Hollywood’s Hottest Bodies Awards.

See who else won Hollywood’s Hottest Bodies awards

Biel hits the gym “four days a week for an hour,” Braganza says. She describes a few moves they did together to get her abs:

1. Back extensions on a stability ball. Start standing with your back to the wall, and then lie forward on the ball with your legs straight behind you and the soles of your feet flat on the wall and your arms extended. Raise torso and legs on an inhale, hold it for a second or two and lower back down. Do 10 in a row, two reps.

Find out how more stars get fit!

2. Pushups. Do a set of three pushups on toes, and then stay in plank position for a count of five before doing another set. The idea is to keep abs contracted for longer than just the exercise.

3. Side-lying planks: These work the oblique muscles. Begin lying on the ground on your side with your feet stretched long. Prop yourself on right elbow, exhale, lift hips off floor. Hold briefly, then lower back to start. Do two sets of 10.

Slow news week :/!

Jessica and Justin have been enjoying a little R&R after Jessica’s huge Valentine’s Day promotion stint in New York City! They were photographed in Switzerland on the 1st and 3rd of March! I’ve added HQ photos of both days!

I hope Jesse had a wonderful birthday!

ComingSoon.net has learned that Jessica Biel may be in talks to co-star with Richard Gere in Garry Marshall’s remake of Frank Capra’s 1948 political drama State of the Union about a businessman who must reunite with his estranged wife in order to improve his campaign run for the President of the United States. It would reunite Biel with the director of her recent romantic comedy hit Valentine’s Day.

Capra’s film, which originally starred Spencer Tracy and Katherine Hepburn, has been adapted with a new screenplay by Rod Lurie, who has more than a little experience with the subject of political campaigning from his 2000 film The Contender and the television drama “Commander in Chief” starring Geena Davis. Richard Gere has been attached to play the lead role for some time with Annette Bening’s name having been mentioned to play his wife.

As of yet, nothing has been confirmed including whether Marshall will make State of the Union his next project following the hit Valentine’s Day. So far, they also haven’t set up any sort of distribution deal though we can expect that to change once everything else falls into place.

Today, March 3rd, 2010 is Jessica Biel’s 28th Birthday, and I want to wish her the best day she could possibly have! Filled with love, friends, and family!

Have a great one Jesse, you deserve it!