Cyrus keeps her pup Sophie close on the L.A. set of her new music video. Plus: Nick & Mariah, Beyoncé, Nicole Kidman and more

LA VIDA LOHAN

With scowling girlfriend Samantha Ronson on the turntables Friday night, Lindsay Lohan stayed close to the deejay booth at Pure nightclub in Vegas. At the party for Lohan's 6126 legging line, models walked the catwalk and Lindsay admitted to PEOPLE, she wears them "sometimes when [she's] traveling."