Britney Spears almost caused a worldwide meltdown on Sunday when she posted a supersexy bikini snapshot on Instagram. The photo, which the singer casually captioned, "Just chilling," is further proof that she's never looked better. Of course, this isn't the first time we've gotten a glimpse of her smokin' hot bod. After flaunting her enviable abs in lingerie on social media, she put her toned figure on display in a bright orange swimsuit at the beach, leaving us all at a loss for words. See her snap above now, and then check out the hottest bikini moments of the year — so far!