Are you ready for this?!
Back in 2004, Nelly and Christina Aguilera teamed up for the hit single Tilt Ya Head Back that appeared on the rapper's album Sweat.
The song, which sampled Curtis Mayfield's 1972 song Superfly, ended up peaking at number 58 on the U.S. Billboard Hot 100.
Related: Britney Spears Shows Off Her HOTT Bikini Body!
But if it the song played out the way it was originally plans, who knows how popular it could have been!
That's because back when the song dropped producer Dorian Moore revealed that the duet was originally offered to Britney Spears instead of Aguilera but she passed because her label Jive deemed the track too "urban." Not only that but Janet Jackson was also considered!
While it's been 12 years since the song dropped, thanks to Singapore's Gold 905 radio station the world is blessed with a 30 second clip of Spears singing Nelly's song!
Ch-ch-check out the AH-Mazing clip of Britney singing Tilt Ya Head Back (below)!