Sir Mick Jagger begged Joss Stone to give his ears a rest in the recording studio - because she refused to stop chatting and singing.
The Rolling Stones legend teamed up with the talkative soul singer, former Eurythmics star Dave Stewart, Bob Marley's son Damian, and composer A.R. Rahman to form a new supergroup.
But as the band, named SuperHeavy, hooked up to write tracks in a rehearsal studio, Jagger quickly realised Stone has an annoying habit - she chatters and sings incessantly.
He tells Britain's Live magazine, "I know she talks all the time and she is always up and laughing spontaneously. She is not like some broody, moody kind of girl who sits in the corner and you don't know what she's thinking.
"She's telling you what she is thinking all the time, which is quite good really. And she sings all the time. She sings all her thoughts. I say, 'Joss, can I get five minutes off the singing? Joss, shut up. Joss!'"