Which Sexy Star Is Hottest in Her Holiday Bikini?

Cameron Diaz, Kyra Sedgwick, Jessica Alba, Rosie Huntington-Whiteley and Rihanna all escaped to warmer temps for the winter, where they showed off their fabulous bods in skimpy bathing suits

From Rihanna to Jessica Alba to Cameron Diaz, Hollywood's hottest celebs flaunted their bikini bods during the holiday break.

Ri-Ri was all curves in an orange printed string bikini and baseball cap while catching some sun back in her native Barbados. Over in Miami, Transformers star Rosie Huntington-Whiteley got her flirt on in a strapless blue two-piece with girly ruffles.

Meanwhile, new mama of two Jessica sizzled in a hot-pink halter string bikini down in Cabo San Lucas. Viva Mexico!

Not to be outdone, Cameron rocked a sporty gray and yellow bathing suit along with her newly shaggy bob in Hawaii. And last but not least, Kyra Sedgwick also hit the Hawaiian surf in a purple and black swimsuit that showed off her slammin' figure.

So which stripped-down star is sexiest? Weigh in below, and then check out our smokin' new Hot Bods 2012 gallery!