Instruct: Classify Amazon reviews into positive or negative sentiment
Query: "When you believe"

This song, sung by Whitney Houston and Mariah Carey is GREAT! Sometimes, it leaves tears in my eyes. But, the song has some contrasts. Whitney Houston has one of the most beautiful voices in the universe. So when she sings the first verse and chorus, and then Mariah Carey starts to sing the second verse... it's a HUGE CONTRAST! Mariah screeches... If Celine Dion, who has the most wonderfully beautiful voice in the universe, had sung it with Whitney Houston, the song would've been irresistible. It would have been so unexplainable beautiful. Anyway, great job, Mariah and Whitney!