VIDEO : Britney Spears and Nelly's 12 Year Old Song 'Tilt Ya Head Back' Leaks Online

Back in 2004, Nelly released "Tilt Ya Head Back," the second single from his album Sweat. While the song featured vocals from Christina Aguilera, Producer Dorian Moore told The St. Louis Post-Dispatch the duet was originally offered to Britney Spears. Spear's label at the time Jive deemed the song to 'urban' and passed. Twelve years later, a snippet of Spears' demo surfaced online, giving fans an idea of what could have been. Singapore's Gold 905 radio station shared 30 seconds of the song, which then made a splash on social media.