Selena Gomez [2] and Demi Lovato [3] go way back. Before their Disney days [4], they actually had roles on Barney & Friends (who knew, right?), and since then, the duo have been through the highest of highs and lowest of lows together. The Wizards of Waverly Place and Sonny With a Chance stars have made red carpet [5] debuts together, starred in nostalgic Disney movies [6] (can they make a sequel to Princess Protection Program yet?), and been nothing but supportive of each other's success, so it's hard not to love this iconic Disney duo.

Whether you're strictly a Selena fan, a diehard Demi-lover, or even an equal fan of the two, this lyrics quiz [7] is for you. See if you know which lyrics belong to which star's famous songs now. Good luck; you might just need it!