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

WATER BABES

Soaking up a little sun, Zac Efron, his girlfriend Vanessa Hudgens and their pal Ashley Tisdale set their sights on dry land Sunday as they hitch a ride on a water taxi through Circular Quay Wharf in Sydney, Australia. The trio are Down Under to promote their big screen release, High School Musical 3: Senior Year.