Celebrity Celebrity Moms Reese Witherspoon Celebrates Her Last Day of Vacay with Cute Snap of Her Son on a Flamingo Floaty By Jennifer Davis Jennifer Davis Twitter Jennifer Davis is a writer, editor, and content strategist living in Atlanta. She was previously the Associate Editor for InStyle, and is currently working as a Digital Content Manager at Cox Business. InStyle's editorial guidelines Updated on January 4, 2016 @ 05:00PM Pin Share Tweet Email Photo: Jason Merritt/Getty Images Reese Witherspoon's winter vacation may be over, but thanks to Instagram she still has the memories. Yesterday, the social media star posted one last picture from her idyllic tropical getaway with her youngest child, Tennessee. And, of course, it's super cute. In the photo, Witherspoon shows off her Southern-girl style in a retro polka dot one-piece swimsuit, while she holds on tight to the gigantic flamingo floaty that her three-year-old son is playing on. "Last day of vacation!" she captioned the fun shot (below). Reese Witherspoon's Amazing 2015, as Told by Instagram This adorable mother-son moment isn't the only photo she shared from her gorgeous vacay. Scroll down to see more envy-inducing snaps from her trip.