No winter blues for Reese Witherspoon.
The actress, 37, rocked a tiny pink two-piece as she lounged poolside in Hawaii, where she attended actor Justin Bartha's wedding on Saturday (Jan. 4). Witherspoon's husband, Jim Toth, is Bartha's agent.
The mother-of-three, who welcomed son Tennessee in September 2012, flashed her tattoo as she basked in the sun.
Witherspoon is an avid runner and a big fan yoga, which might explain why she looks like a total beach babe.