The Lacheys celebrate Simpson's new CD in Hollywood. Plus: Madonna, Heidi Klum, the Olsens and more

SING OUT, SISTER

Ashlee Simpson, Nick Lachey and Jessica Simpson make it a family affair Friday at the release party for Ashlee's new album, I Am Me, at Hollywood's O Bar. Also on hand: Ashlee's pal Wilmer Valderrama, rumored to be the subject of her song "Boyfriend."