I Came To Dance is a reference demo track by Jessica Eden Malakouti AKA Eden xo & Sean Paul, submitted during the sessions for "Britney Jean".
According to Eden, the track was written by herself and Britney Spears recorded it along with will.i.am and Toby Gad, which produced the track. Sadly, the song ended up being scrapped from the final tracklist.
Eden xo's brief talk on Instagram: https://i.imgur.com/wiq3Rkj.jpeg