Aguilera strikes a pose while shopping in West Hollywood. Plus: Brad & Angie, Ashley Olsen, Leighton Meester and more


Before handling hosting duties at club LAX's New Year's Eve bash, Fergie and her Black Eyed Peas bandmates (not pictured) take the stage Tuesday night for a concert at Mandalay Bay in Las Vegas.

See where other stars are ringing in the new year!