Justin Timberlake and Nelly Furtado have agreed not to release the song they recorded together just yet - because they want to save it for a special occasion.
The pair had both been working on new albums with producer Timbaland in Florida, and were thrilled when the rap impresario got them together in the studio.
The two hit it off and started playing around with a song called CROWD CONTROL.
Timberlake explains, "We were both in Miami recording and we did do a song together, but I think we're going to save it for....something.
"It didn't make this record, but you're gonna hear it. I think to keep it fair (we're going to save it).
"I would be jealous if it was on her album and she'd probably be jealous if it was on my album. It's cool - it's a club banger!"