Starpulse — Justin Bieber, Tony Bennett and Neil Diamond got the holiday season off to a musical start in New York on Wednesday night when they performed festive tunes for thousands of fans gathered for the 79... more info

Big Apple Music Scene — Merry Christmas! Santa came early this year, but he's already out of everything good, so he left you a shrug and this cover of "All I Want for Christmas" sung by Justin Bieber and Mariah Carey. In the video they play a pair of flirtatious maybe-lover... more info

ContactMusic — Justin Bieber brought in the official countdown to Christmas in New York last night November 30th as the citys huge Christmas tree was lit in anticipation of the advent calendar month - unveiling the video to his and Mariah Careys cover of her classi... more info

People.com — Mariah Carey, Usher and Busta Rhymes join Bieber at the tree-lighting event more info

Pop Justice — The demurely-titled The GRAMMY Nomination Concert Live!! took place in LA last night, where it was announced that Adele and Bruno Mars had received six nominations each. (Grammy.com) (http://www.grammy.com/news/the-grammy-nominations-concert-live-mar... more info

Perez Hilton — It's arrived!!! Check out the Biebs and Mimi's just-released music video for All I Want For Christmas (above). Super festive! P.S. Mariah looks insanely good in the vid!!!!! Damn, Mimi! Werk!!! more info

Perez Hilton — From Mariah Carey and Whitney Houston to Britney Spears and Christina Aguilera. From Cher and Celine Dion to Madonna and Lady GaGa, everyone loves to compare the biggest and best women in the industry. But do they really hate each other as much as ... more info

411 Mania — Bieber tweets about "All I Want for Christmas Is You".... more info

Perez Hilton — This week, we will finally get to see the music video premiere of Justin Bieber and Mariah Carey's All I Want For Christmas Is You! The singer hit up his Twitter on Saturday and announced the debut! BIG NEWS! Me and @MariahCarey will debut 'All I Wan... more info

Mercury News, California — If the formula isn't broke, don't fix it. Call it the Def Jam way. Take Mariah Carey: Four years after her "Glitter" flop, she officially bounced back with the label's "The Emancipation of Mimi," one of the past decade's best albums, and she followed... more info