Bikini Bum Style Showdown: Ashley Tisdale vs. Irina Shayk vs. Anne Vyalitsyna (POLL)

Ashley T: Bikini Babe
Ashley Tisdale shows off her bikini body in Maui.
Best Bikinis of 2012
See Lea & more in our best bikinis of 2012 gallery!
If you’ve got it, flaunt it!

Ashley Tisdale and models Irina Shayk and Anne Vyalitsyna channeled their inner beach bums and hit surf in teeny bikinis this week. Ashley, who was vacationing in Hawaii, shared a photo of herself relaxing by the sea with the caption, “What a beautiful day.” Meanwhile, Victoria’s Secret Angel (and Adam Levine’s gal pal) Anne V tweeted a pic of herself and Sports Illustrated covergirl Irina “booty shaking” in Miami. 

So, whose cheeky bikini look reigns supreme? You tell us in the poll!

Is it just us or does there seem to be a wave of Hollywood beauties sharing sexy pictures on Twitter these days? From Selena Gomez‘s sexy bikini shots to endless racy pics of Rihanna, be sure to also check out some of the most risque Twitpics in the gallery below!