The singer shows off her toned tummy at a party thrown by another famous blonde in Los Angeles. Plus: More AMAs action, Matt McConaughey and more

MCFABULOUS

American Idol star Katharine McPhee found inspiration for her AMAs look in Demi Moore. "I wanted the Demi Moore hair," she told PEOPLE. One thing's for sure: Her hand-beaded Randolph Duke dress (which she had made shorter) was a sexy new twist for the singer, who actually resembled Cher in her heyday.