Just when you thought Hayden Panettiere couldn't get any hotter.

Our favorite 18-year-old celebrity went and told the UK edition of Glamour magazine about her experimental ways ... if you know what we mean.

We mean kissing girls with tongue. Yeah, baby!

In this classic file photo, Heroes star Hayden Panettiere and a female friend explore and enjoy each other's bodies. Just the way it ought to be.

She didn't dish much on dating Milo Ventimiglia, her Heroes co-star and boyfriend of the past several months. But she did say this.

"It's great to be single. It's great to have boyfriends... or girlfriends. There are occasions when you kiss your best friend growing up, having fun and just goofing about. Like perfecting your technique!"

Umm, yes. Good idea. Keep working on that technique, Hayden Panettiere.