Julianne Hough headed to the pool at her Miami hotel yesterday. Her brother, Derek, and his girlfriend were along for the sunny day, which happened to be Julianne's 23rd birthday. She lounged in her bikini after heading to the Rock of Ages set, where the cast and crew, including director Adam Shankman, apparently threw her a surprise celebration. The fun kicked off over the weekend, though, when Julianne's boyfriend, Ryan Seacrest, and best friend, Maude, joined her in Florida. Julianne Hough and Ryan Seacrest showed PDA poolside when the actress wasn't busy making a splash in the water.