Who needs a photographer when you've got a smartphone? Click through to see the sexiest bikini selfies from Twitter and Instagram courtesy of stars like Kim Kardashian, Rihanna, Mariah Carey, and more
Just out for a stroll? Mariah Carey—who has a seemingly endless supply of bikinis and bikini selfies—took one of her wee dogs for a walk in the Aspen snow on Dec. 22, 2013, in nothing but a cherry-red bikini. She and husband Nick Cannon were vacationing at the Colorado ski destination with their twins Monroe and Moroccan. "It's just a tradition," Carey captioned her dog-walking pic. "#aspen #coldyethot"