Kate Upton in a Bikini, Bar Refaeli Kissing a Girl, and Josie Canseco Bikini Booty Highlight the Sextastic Twitpic Roundup

And the hits of summer just keep rolling along. The heat, the sun, the universal access to cameras. It's all coming together to create the perfect storm of our favorite sirens snapping hot skin-baring photos of themselves. It's like opening your front door and finding a pot of gold delivered for a leprechaun, just for you being you. Happy days.

This week's Sextastic Twitpic Roundup includes some true stunners including Bar Refaelikissing another girl, Katee Sackhoff in her underwear, Vanessa Hudgens bikini posing, Josie Cansecoand friend flashing butts on the beach, Kate Upton on her Beach Bunny bikini photo shoot, Sofia Vergara in cleavetastic bikini mode, Ireland Baldwin strutting her own two-piece showoff, Kelly Brook covered topless, and much more. You owe it to the future King George to check out each and every one of these photos. Enjoy.