"Miami is way crazier than Vegas!" she tweeted on Sunday, April 7, of her short getaway. A few hours earlier, the singer also posted a photo of herself looking ecstatic as she stood ankle-deep in the waves, clad in a red strapless bikini top, short demon cutoffs and a jean shirt.
"Good morning from Miami," she captioned the carefree shot.
The break is a welcome one for Rimes, who will next launch into a heavy tour schedule that includes stops at Washington, DC, North Carolina and Michigan as part of her promotions for new album Spitfire.
Rimes has previously come under fire for her thin frame, but has been showing off a healthier figure since going to rehab last summer, just ahead of her 30th birthday on Aug. 30.
"I've been in therapy my whole life," the Grammy winner told the Boston Herald last October. "I like going. I like being able to have that third-party input and someone to listen that has nothing to do with your life. Everyone has an opinion of how I am and how I should be, and now I'm focusing on how I want to be."
"I think it's really hard to deal with Twitter and Facebook and all these social media outlets," Rimes continued. "And it's hard to take it day after day of reading and seeing things that someone you don't even know says about you. As much as you said you don't want it to penetrate, it does, because you're human."