Rihanna revealed today that she collaborated with David Guetta on two songs on her 'Unapologetic' album — 'Right Now' and 'Phresh Out the Runway.'

"There's another secret collab on #UNAPOLOGETIC," she teased, before adding, "Guess who is featured on the #7th song on #UNAPOLOGETIC, HINT: his birthday is tomorrow November #7th."

Finally, she revealed that she was talking about the French EDM star:

 

The opening track's title was originally reported as 'Fresh Off the Runway,' but RiRi is calling it 'Fresh Out the Runway.' That still conflicts with the iTunes listing, which refers to it as 'Phresh Out the Runway.' No matter how it's spelled, with Guetta involved, expect the track to be a dancefloor anthem.

Rihanna worked with Guetta in 2009, contributing vocals to 'Who's That Chick,' a track from his 'One Love' album. She was seen attending his performance at Coachella earlier this year, which should have been a tipoff that she was probably working with him at the time.

We wonder if the pop star has any other secret guests up her sleeve for 'Unapologetic.' Chris Brown, Eminem and Future are already confirmed as guests on the album, which drops on Nov. 19. Rihanna is so excited about the record, she tweeted a bikini photo this weekend.

Listen to Rihanna, 'Diamonds'