Only a real man's man like Mark Wahlberg can pull off riding such a tiny bike on the streets of Los Angeles -- and still look totally cool while doing it!

We caught up with The Fighter star as he taught his son Michael, 5, how to ride the tiny motorbike at a basketball court near the actor's LA-area home, on Monday.

Wahlberg must have forgotten his helmet at the house, but thankfully the actor made sure his adorable son's headgear was strapped-on tight before letting him take a ride.

What a great dad!

Mark Wahlberg told Vulture that he is in talks with Justin Bieber to do a movie together, and while he wouldn't provide too many details, he revealed that it is "kind of like a reluctant mentor in an inner-city environment."

"We’re putting it together," he continued. "We’re doing it at Paramount. We pitched them the idea and, you know, we’re talking about doing it." Wahlberg added, "He loves the idea. He's been sending me video, he sent me a video of himself, and, yeah, I think he’s really talented." Wahlberg said it will be more of a drama than a comedy, and sadly, neither he nor Bieber would sing or dance in the project.

Mark Wahlberg probably wishes he was vacationing in Hawaii, but since The Fighter star is stuck in LA, he'll wear his love of the islands on his shirt.

As he left Sushi Roku in Los Angeles, the former rapper known as Marky Mark, showed off his "Mahalo" T-shirt ... the Hawaiian word for "thanks."

After seeing his fine form on the big screen as a boxer, we're giving thanks that he stays so lean and sexy. We'll take an upper cut from this guy anytime!

Courtesy: Sports Illustrated

Mark Wahlberg, wearing nothing but boxing shorts and gloves, is Sports Illustrated's cover boy ... and we're not complaining.

At 39 years old, the shirtless star of The Fighter is still hotter than ever. Oh, and we can't forget about Christian Bale standing next to him ... who almost looks unrecognizable. We know underneath all that scruff is a sexy man.

SI has named Wahlberg's latest film "the best sports movie of the decade." The rapper formerly known as Marky Mark has also received a Golden Globe Best Actor nomination for the role.

As for nabbing the cover of SI, Wahlberg says, "As somebody who always dreamed of being a professional athlete, to be on the cover of Sports Illustrated is an amazing accomplishment."

In the film, Christian Bale plays Wahlberg's older brother, but in real life, the guy DOES have a sense of humor. During a recent interview, Bale spontaneously started singing The Powerpuff Girls theme song. Of course, he blamed the song being in his head on his daughter, but it's adorable. Take a listen.

Mark Wahlberg and his smokin'-hot model wife Rhea Durham left their five kids at home Monday night to attend the Hollywood premiere of his new movie The Fighter.

The movie, based on a true story, follows the early years of boxer "Irish" Micky Ward (Wahlberg) and his brother (Christian Bale) who helped train him before going pro in the mid 1980s.

Bale appears noticeably thinner in the film, and since he is known for the ability to lose significant weight for roles, we're glad to see he's looking healthy and happy alongside gorgeous his wife:

Random celebrity fun fact: Christian Bale's wife Sibi Blazic, used to be Winona Ryder's personal assistant. -- You've come a long way girl!

Amy Adams looked divine in a lovely silver tulle dress and sexy red satin shoes. --and for some reason Erik Estrada showed up too. Random!

The Fighter hits theaters December 10, so until then check out our red carpet footage of the film's sexy stars!

Mark Wahlberg took daughter Ella Rae and a pal, along with his son Michael to Mr. Bones Pumpkin Patch in West Hollywood yesterday, and the kids had a blast dressing up, going down the slide and picking out jack-o-lanterns. Mom Rhea Durham was there too, looking gorgeous as ever after four children:

Here's the trailer for The Fighter, which follows boxing champ "Irish" Micky Ward on his way to the top and all the drama that ensues with his family and his love life. The film hits theaters on December 2010, so this is yet another flick we're adding to our must-see holiday list!

Yesterday we spotted Mark Wahlberg running errands in Beverly Hills, and the hunky dad was wearing a pair of sneaks with a very familiar name etched on the side. We've been glued to the tube for the whole season of Entourage, so we can't wait to tune in to HBO next Sunday for the season finale!