The teenage heartthrob turned 16 on Monday and he kept his fans in the loop with birthday updates on Twitter.

“[sic] thanks to everyone for the birthday wishes. u guys all changed my life and are giving me a great birthday. appreciate it,” he tweeted on Monday.

Justin Bieber’s celebrations were all about good, clean fun. Last weekend he hung out with baller Kobe Bryant at a Lakers game. On his actual birthday, he went bowling with family and friends.

Since he’s now legal to drive, I’ll bet there’s a shiny set of wheels waiting for him. “I think I want a Range Rover,” he told People. Diddy may also give him a set of keys—secondhand ones, that is. “He said when I turn 16 he was going to give me his Lamborghini,” Bieber says. “But we all know Diddy’s not gonna give me his Lamborghini. He’s all talk.”

I guess he’ll have to borrow Sean Kingston’s Ferrari F430 sports car again. We did see him drive it around Miami last month.

Happy birthday, Justin!

Some 16,000 students and teachers attended the musical event. Guest performers such as The Jonas Brothers, Justin Bieber, Hedley and dancers from So You Think You Can Dance Canada were received with ear-splitting cheers from the crowd.

The event wasn’t just about a cool concert. The kids and teens in attendance were in full support of the organization’s cause—to make tangible actions that make a better world, especially for children. Humanitarians, environmentalists, motivational speakers and politicians were greeted like rockstars at the event.

SOS call: The Jonas Brothers made a surprise appearance.

Justin Bieber performed the acoustic version of his hit “One Time” at We Day.

“We share with our team and we truly believe it’s not about us. It’s about the issues and we share that with all the young people,” said Marc Kielburger, one of the founders of Free The Children. “We’re just happy that the young people feel that it’s really cool to get socially engaged and what we’re fighting most of all is we’re fighting apathy.”

“Everyday action is our message and people respond to that message because they’re really searching to bring about a positive change in this world,” added co-founder Craig Kielburger.

With the success of the rally, it looks like the kids heard the message loud and clear.

For more info about helping fight child labor, visit www.freethechildren.com.

His story is that of your typical YouTube sensation. Three years ago, the then 12-year-old Canadian joined a local singing competition called Stratford Idol and won second place. He wanted to share his victory with his friends and family who didn’t get to see the show, so he posted his videos on YouTube.

“But it turned out that other people liked them and they started subscribing to them,” said Justin. “That’s how my manager found me. He saw me on YouTube and contacted my family and now I’m signed!”

It’s not everyday that a 15-year-old gets signed by R&B singer Usher. In October 2008, Justin was torn between signing for Justin Timberlake and Usher. “It turned out Usher’s deal was way better,” Justin revealed. “But I still would like to work on a collaboration with Justin in the future,” he said during a phone-in interview with Ryan Seacrest.

“Things are just happening so fast,” he added. It’s been less than a year since Justin signed to Island Records, and he’s already making the Hollywood rounds. Numerous TV and radio guestings, red carpet appearances, a debut album, a music video, and 535,000+ facebook fans are keeping this lad busy.

His recent stint involves making his “Favorite Girl” happy. Justin hollered at Tricia Matibag, winner of his MTV VMA red carpet shout-out competition. Check out this ultimate fan’s winning video entry:

Get the Bieber fever!

www.JustinBieberMusic.com

http://www.youtube.com/justinbieber

http://www.youtube.com/kidrauhl

http://www.myspace.com/justinbieber

http://www.twitter.com/justinbieber

http://www.imeem.com/justinbieber

http://ilike.com/artist/Justin+Bieber

photos from justinbiebermusic.com