Hollywood stars are using their fame to help raise money and awareness for Japan following the earthquake and tsunamithat devastated the country last week, and RadarOnline.com can bring you a roundup of all the A-list altruists.

PHOTOS: Hollywood's Most Charitable Stars

Disney star Demi Lovato has donated $1 million of her own money to the relief cause, and has encouraged her fans to give what they can.

Seems celebrities really aren’t that different from the rest of us when it comes to getting star struck!

Justin Bieber went from teen sensation to regular fan last night when he spotted Angelina Jolie on the Golden Globes red carpet – asking the gorgeous actress to pose up for a photo with him.

PHOTOS: Stars Arrive At The 2011 Golden Globe Awards

The 16-year-old quickly took to his Twitter account to post the results along with the comment: “Angelina Jolie with @Justinbieber  and 3D #purpleglasses oh yeahhhhh”

Holiday music is a sure sign that the season is here so RadarOnline.com is bringing you the plans of some of your favorite musicians like Mariah Carey, Jessica Simpson and Taylor Swift.

VIDEO: Mariah Carey’s Holiday Diva Sing-Off With Mom

“The holidays are going to be all about family and fun for me this year. I’m so excited to be spending the holidays in Arizona with Kristi and Raine and Jorja,” rocker Bret Michaels told RadarOnilne.com exclusively.

“I rented out a paintball arena for the four of us, so after we open presents we can keep the fun going. I can’t think of a better way to spend the holidays than having a good time with all of my girls, so this’ll be a great way to wind down the holiday season.”

For more of the stars' holiday plans, go to PopEater.

PHOTOS: Brett Michaels Comeback Concert

Teen singing sensation Justin Bieber's concert at Madison Square Garden in New York Tuesday is going to have some major star power for the fans.

PHOTOS: Miley Cyrus And Taylor Momsen Too Sexy Too Early?

Joining Justin on stage will be teen sensation Miley Cyrus, Boyz II Men and Usher.  Is Justin trying to make Kim Kardashian jealous having the newly single Miley on stage with him?

VIDEO: Kim Kardashian & Justin Bieber Get Playful In The Surf

Kanye West will also be appearing on stage, but don't worry, he was invited and he isn't going to steal the mic from 16-year-old Bieber the way he famously did from Taylor Swift.

PHOTOS: Miley In A Sexy See-Through Dress Filming Video

The website Michah Jesse.com broke the news of the celebs who will be at the Bieber concert.

PHOTOS: Taylor Swift Is A Retro Bikini Babe

The celeb heavy concert will be performed on the set of Justin's untitled 3D movie, and the surprise performers will definitely make the concert even more exciting.

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