Parties! The style, stars and scoop from Hollywood's hottest events

New mom Christina Aguilera showed off her post-pregnancy form when she hit Best Buy in West Hollywood to sign copies of her Back To Basics: Live And Down Under DVD set. "I'm very excited about this whole incredible thing that's taken place in my life, between the pregnancy and the birth," the songstress told Ryan Seacrest on his KIIS-FM radio show earlier in the day.