X Factor's Olly Murs and Louisa Johnson will team up together on new single Unpredictable.
It's Olly's latest song to be taken from his fourth number one album, 24HRS, which was released last year.
Louisa will provide vocals on a new version of the song which will be put out for download and streaming soon.
Olly teased fans yesterday on Twitter: "I can now reveal my next single is UNPREDICTABLE....A duet with the awesome @louisa #unpredictable"
Louisa added: “Oh yeeeeaaaaaaaaahhhhhhhhh.”
The duet follows news that Louisa will be supporting her fellow X Factor alum on tour this summer.
Unpredictable will make for Louisa's fifth single, following her winner's song Forever Young, solo tracks So Good and Best Behaviour, and her collaboration with Clean Bandit on Tears.
But as yet, there is still no news on when Louisa's album could be out despite her winning The X Factor almost two years ago now.
Speaking back in March, Louisa teased her unreleased debut record: "All my songs are very powerful and soulful and, although I love being soulful and bluesy, I also like dancing and being very pop.
"Then there's a sexy side and funny side and a sad side. It's all about variety and changing it up."
And she revealed the decision to delay her album's release was her own.
“I wanted to make people realise from the start that I wanted to do things differently,” Louisa told The Sun's Fabulous magazine this month. “I love the way The X Factor works, but I thought: ‘Personally, I wouldn’t do it like that.’
“I didn’t bring out my album in November [the year after winning], like other winners.
“You have to stand your ground with these things if you think something is right.”