Hear the long lost version of Nelly's 'Tilt Ya Head Back' featuring Britney Spears

The Britney vs. Christina rivalry has been brought back from its early-2000s grave, whether you like it or not. 

Way back in 2004, Nelly and Christina Aguilera linked up for "Tilt Ya Head Back," a very 2004 track about a girl who has it (Christina) and a guy who wants it (Nelly) -- with a video where Christina goes full Marilyn Monroe. 

But that same year, songwriter Dorian Moore said that song, off Nelly's Sweat, was originally meant to be a collaboration between Nelly and Christina's then-pop rival of sorts, Britney Spears. According to Moore, Britney's label, Jive Records, backed out because the track sounded too "urban."

Now, a snippet of that "too urban" version has surfaced online after Singapore radio station Gold 905 debuted 30 seconds of it. While it may not be the new Britney music fans have been waiting for, it does deliver all sorts of "Toxic"-era feels.

Hear the original version of "Tilt Ya Head Back" below:

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