Stone slept in studio to record SuperHeavy album

British soul singer JOSS STONE was forced to sleep in the studio while recording her new SUPERHEAVY project with SIR MICK JAGGER - because the busy stars couldn't afford any downtime.

The pair teamed up with former Eurythmics star Dave Stewart, Bob Marley's son Damian, and composer A.R. Rahman to form the supergroup, but they were so pressed for time, Stone decided to turn the recording studio into her makeshift home.

Jagger tells People magazine, "We set up two blocks of 10 days in a room together, no downtime. Joss slept in the studio. I came in one day and said, 'Joss, wake up! Have some coffee!'"

The Rolling Stones frontman insists the intense music-making sessions for their self-titled album worked out well, although not every day was as smooth as others.

He adds, "Everyone was encouraged to put their ideas on the table and not be shy. Of course, not everything was brilliant. But it was really cool."