The pop star rocks the mic in L.A. during rehearsals for Sunday's American Music Awards. Plus: Heidi Klum, Matthew & Levi, Rob & Taylor and more

TEAM SPIRIT?

Is she still rooting for the Cowboys? Jessica Simpson may have split from Tony Romo in July, but the singer still proudly wears his team's sweatshirt during a dressed-down shopping trip Wednesday at a Beverly Hills Williams-Sonoma.