Mandy MooreMandy MooreIt's like being back in the classroom again.

Poor Mandy Moore has had to deny claims that a certain young Hollywood gent took her virginity.

Appalled at former boyfriend Wilmer Valderrama's boasts that she'd lost her V plates to him, on the Howard Stern radio show in April, Mandy has spoken out.

She says his chat is "utterly tacky, not even true".

She went on to say: "It hurt my feelings because I like him."

But it seems she's not the only one a little miffed by Wilmer's loose tongue.

During the interview, he also claimed to have slept with Lindsay Lohan, Ashlee Simpson and Jennifer Love Hewitt.

But take your fistful of salt...

Wilmer ValderramaWilmer ValderramaJennifer Love Hewitt is surprised by the That 70's Show star's claims, saying:

"I was told that we had all these very steamy encounters and I was like, 'Really? Well, I would have loved to have been there!"

Wilmer, ever heard of discretion?