The band SuperHeavy, composed of music heavyweights Mick Jagger, Dave Stewart, Joss Stone, Damian Marley and A.R. Rahman, have just released their first single and we’re giving you a behind-the-scenes look!

The reggae/pop song “Miracle Worker,” may have been a miracle in itself, considering that it wasn’t planned.

“It was very different because we didn’t know the people really well, we didn’t rehearse and we didn’t have songs written,” said Mick, who produced the album with Dave Stewart. “We just sort of sat there looking at each other and just started playing.”

Joss Stone revealed that her favorite part about “Miracle Worker” is the fact that it was improvised.

“That’s why I love that one,” Joss said. “That was just a jam and then we just kind of made it up as we went along.”

SuperHeavy’s self-titled album drops September 20. Watch the video for a behind-the-scenes look at how the single was made.