Red Hot Chili Peppers drummer Chad Smith has slammed U2 and Black Eyed Peas for letting their music be used on TV advertisements.

Smith - speaking from the T In The Park Festival - rounded on the two bands for both licensing out their songs to promote iPods � branding Black Eyed Peas in particular as �a bunch of idiots�.

He rants to the Daily Record, �I'm fine with getting our music out to people but I don't want to be on a TV commercial with some guy bowling and then music comes out of his phone. There's no artistic credibility. I'd feel like a jerk if we did that. I think Black Eyed Peas look like a bunch of idiots. It's dangerous.

�The U2 song on the iPod (Vertigo) when it came out was weird and it was longer and it had more parts. It's dangerous to tie yourself in with a product and also the visuals that go along with it.

�I think young people, not old guys like myself, think it's normal now to have Led Zeppelin on jeans commercials. That's not normal to me."