Slipknot frontman Corey Taylor has lashed out at Grammy Awards bosses, insisting music's big night has become "meaningless".

The often masked rocker, who has been nominated 10 times as part of Slipknot and Stone Sour, claims the annual event is nothing more than a televised music show.

He's particularly irked by the Best Metal Performance award, which Slipknot won in 2006 for their single Before I Forget, admits he's convinced voters "threw f**king darts" to pick a winner.

He says, "There's two schools of thought. It's, like, 'Well, we're just gonna try and vote for the most obscure Norwegian black metal f**king band... with illegible font. We're gonna give it to you tonight'. Or it's, like, ' 'Well, this is everything that has been played on the radio for the last five minutes... We're gonna f**king celebrate you. Blah blah blah'.

"Old people vote. I'm convinced that's the reason we won - because an old person went, 'Slipknot! I read a magazine article about them. They've been around. Here you go. Take it. The kids are gonna be real happy'.

"You look at it, and you're, like, 'F**kin' Judas Priest won one for a live version of a song they released 40 years ago, and the live version was released 20 years before that. And they only re-released it because of a box set. And they gave it to them? I'm, like, 'F**king what?' It doesn't mean anything. I mean, that's like trying to hit a f**king needle with another needle. You have one metal category, you have one basic rock category, and you've got bands like Fun winning it. And I'm, like, 'Really?'"