Oasis frontman Liam Gallagher has lashed out at fellow British rocker Chris Martin for collecting a Grammy Award while dressed like a garbage man.

The singer has accused Martin, who is married to style icon Gwyneth Paltrow, and his bandmates of being too scruffy, and insists they shouldn't attend prestigious awards ceremonies in the same tatty military clothes they wear onstage.

Gallagher - who is launching his own fashion line, called Pretty Green - says, "They have got to be the worst dressed band. What are those uniforms about? My kids have got play outfits that are better than Coldplay's.

"I mean, if you're gonna win a Grammy Award, don't turn up looking like binmen! Disgraceful. Make a bit of effort, I say."