LeAnn Rimes has never been shy about showing off her well-toned body, and the country singer leaves little to the imagination in a sexy bikini video she shared to social media.

Rimes turned to Instagram to share a throwback clip from a shoot she did for Us Weekly , writing, "Throwing it back to a little behind the scenes action at one of my favorite shoots this year." The clip shows Rimes posing in a tiny blue two-piece that barely covers her insanely sculpted body.

The 34-year-old country singer works very hard to maintain her fitness, routinely working out with weights and bike training. Rimes admits she turned to boxing workouts to not only maintain her physique, but relieve stress in the period after she divorced her first husband and married Eddie Cibrian, which brought an avalanche of adverse publicity.

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"Boxing is one of the best workouts you could possibly do," she tells Shape. "A two-minute round doesn't sound like much, but when you're moving constantly and throwing punches, it wears you out. And boxing workouts really build up your stamina."

Though Cibrian is also into exercise, Rimes says they each do their own thing in the gym.

"He's going to kill me for saying this, but when I ask him to work out with me, he always says no. And when I ask why, he says, 'Because your boxing workouts are too hard,'" she shares. "And he's right: I'm serious about my exercise. I don't just doodle around. I see people at the gym talking on their cell phones. If they think their bodies are really going to change...I mean, you've got to put in the effort!"

It sure looks like it's working for Rimes!

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