As if lighting up the Empire State Building wasn't enough, there's no harm in wearing a big fat engagement ring to up the publicity of your new album. It's being reported that Mariah Carey, who just released E=MC2, has a rock on a very important finger given to her by Nick Cannon (who is 11 years younger than her). The ring (pictured) is identical to the one that Cannon gave his ex-fiancee Selita Ebanks. Classy!......