The Week in Celeb Twitpics (PHOTOS)
Summer is in full swing and celebrities are slipping into bikinis for a day out at the beach.
Hollywood hottie Rihanna tweeted seaside snapshots during her vacation in the French Riviera, while Julianne Hough hit the shores of North Carolina with her folks.
Who else headed for the open waters -- and tweeted about it?
Launch the gallery to see this week's best celebrity Twitpics.
Rihanna, 24, definitely got a little bit Twitter-happy during her vacation.
See below for the full collection of her vacay photos.
rihanna's sexy vacation snapshots
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