Jennifer Lopez Raves About Casper Smart: 'He's So Cute'

Jennifer Lopez "Dance Again" live on American... by HumanSlinky

Their hot romance of six months has hardly been a secret. But no matter how high-profile Jennifer Lopez might have been lately, she has yet to make much of a peep about boyfriend Casper Smart until Thursday night, that is.

For the results show, the American Idol judge went on stage to perform her recent "Dance Again" single, and she did not go alone. Backed up by an entourage of bare-chested hunks, she singled out Smart (with whom she performed a sexy routine) at the end of her performance after he plucked sparkly confetti out of her hair, announcing, "He's so cute."

She then blew a kiss to the audience.

PHOTOS: J.Lo & Casper: So Into Each Other!

Though speculation rose in March that the two might tie the knot, the rumor was quickly laid to rest. And while no rings were proffered, last month, for Smart's 25th birthday, Lopez, 42, bought him a truck as a present.

As she Tweeted, "@BEAUcasperSMART 'Beau has a birthday we're so glad we hope it[']s the happiest Birthday Beau ever has!' #singingtweet. HAPPY BIRTHDAY BEAR! !!!"

For much more on J.Lo and Casper, pick up this week's issue of PEOPLE, on newsstands everywhere Friday