Hilary Swank showed off her impressive, and very toned, bikini body on the beach in Oahu yesterday. She's in Hawaii with her boyfriend John Campisi and his son Sam and the trio stopped off for ice cream between lounging sessions. Hilary's vacation comes right after wrapping up work on the set of New Year's Eve in NYC. She is part of the very star-studded cast that includes everyone from Zac Efron and Halle Berry to Ashton Kutcher and Sarah Jessica Parker. Hilary has also been lending her help to the Japan relief efforts and participating in the White House mentoring program after her very glamorous Oscars red-carpet appearance.