Kelly Clarkson had a fling with her "American idol" runner-up Justin Guarini, who said he also had a thing with the first season's fourth place runner-up, Tamyra Gray.

Wow. Somebody thinks he used to be Jared Leto or something.

According to Radaronline, Guarini talked about the relationships during a performance of his one-man cabaret show, "Lovesick," in New Hope, Pennsylvania, on Valentine's Day.

The website said a reviewer reported Guarini told the audience that he "actually had a serious thing with Kelly Clarkson ... It started on the set of From Justin to Kelly, the quickie beach movie they did after Idol, and ended when her career really took off and his didn't."

In 2012, Guarini told Yahoo that Clarkson was "like my sister. "We've just always been such good friends," he said, admitting, "I'd say we had a good time."

Better than we knew, apparently.

During his Feb. 14 show, he dedicated Brenda Russell's "Get Here" to Clarkson. One critic reportedly called Guarini's obvious "heartbreak" over the end of their romance the "highlight of the show."

He told the show's audience he also had a fling with Gray.

Guarini has been married for four years and has two children, according to Radarlinline. Clarkson is expecting her first child with husband Brandon Blackstock later this year.

Contact Tony Hicks at Facebook.com/BayAreaNewsGroup.TonyHicks or Twitter.com/insertfoot.