Julianne Hough joined her long-haired costars Russell Brand and Alec Baldwin on the Rock of Ages set in Miami yesterday. The gang suited up in their '80s gear for another day of shooting the heavy metal musical. Her latest sexy costume gave us a peek of her abs, but it was Julianne's bikini-clad make-out session with Diego Boneta last month that really showed off her toned assets. Alec's trip down South was short lived, since he's already back in NYC. He's been the target of media speculation this week with rumors Alec is considering a run for the city's mayor in 2013. The 30 Rock star's already got the support of Hollywood, since Jennifer Garner said Ben Affleck would consider lending Alec his support.