The 28-year-old star posted the snap of herself sunbathing with her 37-year-old boyfriend Eddie Cibrian on the social networking site earlier today.
She tweeted: “First sun! SPRING!”
The Grammy Award-winning artist joked last month on Twitter: “Maybe it’s time for a nude pic, so peeps can see how I look nowhere near what these stupid pics are trying to [make] me look, LOL #joke”.
Rimes fired back at reports claiming that she was too thin following her appearance at an NCAA basketball game on Monday.
Photos of the singer looking gaunt surfaced online after she sang the American national anthem at the NCAA National Championship in Houston.
Responding to the speculation that she has lost too much weight, she tweeted: 'Dear Lord! I do not workout too much nor do I starve myself. I'm so over this and moving on.'