Vanessa Hudgens let loose off the shores of Oahu on Saturday with boyfriend Austin Butler. The couple paddled around the lagoon close to their resort then shared a romantic sunset embrace. She's back in Hawaii to promote her latest film, Journey 2: The Mysterious Island after shooting it there in the Fall of 2010. Vanessa costars in the 3D adventure flick, due out Jan. 10, with Dwayne "The Rock" Johnson, Josh Hutcherson, and Luis Guzman — stay tuned for our exclusive interview with the entire cast! Since arriving in Hawaii it's been a mix of work and play for both Vanessa and Josh. He's been spotted taking surfing lessons while Vanessa modeled a red bikini and chilled on the beach with Austin late last week.