Foo Fighters frontman Dave Grohl was thrilled when Norah Jones agreed to sing on his new album even though he knew his fans would be horrified.
Grohl insists she is perfect for their disc In Your Honour.
He said: "I know everybody thinks she's a weird choice for a Foo Fighters record but when you hear the song you'll understand.
"I didn't realise how talented she is until she came into the studio. She has perfect pitch, timing and an incredible sense of arrangement.
"You can't help but be like: 'Oh my God, she's a genius!'"