Clarkson, who was recently engaged to boyfriend Brandon Blackstock, says she's never had an interest in women, the Los Angeles Times reported Friday.
"People think, 'Oh, she's been single for too long,'" Clarkson told Cosmopolitan. "That's kind of an insult to the gay community. Being single doesn't mean you're gay."
Clarkson said she's "never insulted" by the rumor.
"I mean, I get hit on by the hottest girls ever. Oh, my God, if I were a lesbian, I would be so in luck. But it's just not my thing. I've always batted for the boys' team," she said.
"[U]sually the guys who hit on me are tools ...," Clarkson added. "It's like 'American Idol' auditions: The guys who are the most confident are the horrible ones, and the ones who are good have no confidence at all."