Foo Fighters’ Dave Grohl has posted an open letter urging metal overlords Metallica to make a “kick-ass” album.

Metallica are in the process of finishing off their new collection, the somewhat belated follow-up to 2003’s ‘St Anger’.

In the letter Grohl, a longtime fan of the trash metal pioneers, declares his love of the band and even admits his fondness of the disappointing ‘St Anger’ album.

He writes: “Hey, it’s Dave! Remember me? Yeah, I’m the guy that’s been listening to your band faithfully since 1983. I bought your first album ‘Kill ‘Em All’ from a mail order catalogue called Under The Rainbow, I think. Actually I can’t remember. It was 1983 for Christsakes! But that album changed my life and I’ve been listening to your albums ever since (even ‘St Anger’!).

“I can’t wait to hear the new shit, and no matter what you guys do I’ll always be first one at the shop waiting to hear it. I’m sure you’ll come out and blow everybody’s fuckin’ minds, because you’re fuckin’ METALLICA!

“Good luck. And don’t release it until it’s kick-ass.

“There are times where I’ll walk upstairs after the show, and my mom will be sitting on the couch with Billie Joe Armstrong from Green Day, drinking a pint of beer. She’s totally cool.” Nice guy.. love your mother.. Forget about troubles from the evil world. That’s absolutely so cool man, when you are a successful singer and your concerts go house full jam packed you can have any one by your side to flaunt off your success and things to your girl friend but to take your mom on tour and take her to the concert and have her watch your performances and then get her some beer all sounds extremely cool, I would always love to take my mom with me where ever I go, you know sometimes you feel like catching your mom’s hand and telling let’s go to the mall and have some fun, buy ice creams and see some cool gadgets that I like to buy this Christmas and ask her if she like them too so that there is a consensus on the purchase I make. Well all in all nice to hear that his mom and he get along well.