Katy Perry has ruled out a stint as a judge on American Idol, insisting the talent show is too much of a commitment for her at this moment.

The pop superstar has confirmed producers approached her and asked if she'd be interested in joining a new-look judging panel - but she had to turn them down.

She tells The Hollywood Reporter, "People have reached out to me about the possibility of being involved, and it's not right for me yet... It's a real commitment to be on one of those shows."

Reports suggest Perry, will.i.am, Miley Cyrus and Fergie have all been considered as possible replacements for current judges Jennifer Lopez, Randy Jackson, and Steven Tyler in a bid to compete with rival talent shows The X Factor and The Voice.