Dave Grohl likes to sing in his underwear.

The Foo Fighters frontman - who has daughters Violet, eight, Harper, five, and Ophelia, three months, with wife Jordyn Blum - unwinds at the end of a busy day at home with a glass of wine in his home studio.

He said: ''I've done three-quarters of a bottle of wine, and I'm in my underwear, totally rockin' these riffs all night.''

While he is partial to a glass of wine, the 'Learn to Fly' rocker - whose late Nirvana bandmate Kurt Cobain was addicted to heroin - insists he isn't interested in taking drugs.

He told Rolling Stone magazine: ''To this day, I have never done cocaine, because I know me. Never tried heroin. Pills are lame.

''I like wine. I'm the fun drunk. You know I'm wasted when I shut up.''

While Foo Fighters have only just released their new album 'Sonic Highways' - which they recorded in various US cities after examining the musical history of each one for an accompanying documentary - Dave already has plans for their next record, which he has promised will be groundbreaking.

He said: ''I don't think anyone's ever done it. And it's f***ing cool. It will blow everybody's mind. Nobody has the balls to do it. And that's three years away.''