Mariah Carey & Whitney Houston "When You Believe"

You would think a duet from two of the biggest female divas singers of their time would result in a huge hit, but that wasn't the case with the song "When You Believe" from Mariah Carey and Whitney Houston. The duo recorded reportedly did not like one another and sought to disprove the rumors with the duet for The Prince of Egypt Soundtrack in 1998. While song only proved to be a Top 20 hit on the Hot 100, it fared much better on the Adult Contemporary Chart (#3).