*Jordan Sparks, on Sunday, showed off her slimmed-down figure by tweeting a photo of herself posing in a bikini.

Of her weight loss, the Season 6 “American Idol” winner tells People.com: “It was just a shift in my thinking. Instead of talking about being more active, I just got up and did it.”

“There’s no secret,” adds the 21-year-old. “Anybody can do it.”

Describing her polka dot orange and blue two-piece, she tweeted, “I don’t know why but my bathing suit reminds me of fruity pebbles.”

Her weight loss isn’t keeping Sparks from indulging in sweets, especially now that she’s 21-years-old.

“Love that I can now bake my coconut rum raisin cupcakes because I can legally buy the rum! Ha!” she tweeted.