Sir Mick Jagger felt the wrath of Joss Stone while collaborating in the studio after telling the pop star her songwriting was "rubbish".
The duo has teamed up to record new material as rock supergroup Super Heavy, which also features the Eurythmics' Dave Stewart, reggae superstar Damian Marley and Oscar-winning composer A.R. Rahman.
But the Rolling Stones frontman admits their jam sessions weren't without confrontation.
He recalls, "We were writing a lot of stuff and throwing it away. I would say, 'That's rubbish, another cliche, Joss.' And she'd reply, 'Well, you come up with something then!'"
Super Heavy is due to release its debut LP in September (11).