Nick Cannon celebrated his 29th birthday at the Bellagio in Las Vegas. Guests included Mehki Pheiffer & Aubrey O'Day formerly of Danity Kane. The couple looks great and it's nice to see them happy! Mariah recently debuted on the BillBoard 200 Charts at #3 selling 168,000 copies in her first week for Memoirs of an Imperfect Angel. The buzz is she will be releasing a remix version of Memoirs later this year where every track is remixed. Peep more pics from the birthday bash below.