I knew every single song, which means that everybody sang songs from her first albums -- including (yay me) one of my absolute favorites of hers (from her first album), "Vanishing."
But what does it say about her career that everybody chose her early songs? I know she's released albums since Music Box.
(Googling has revealed that one of the songs was from the album that succeeded Music Box, Daydream. My bad.)
But still...Daydream was 1995. 13 years ago.
No one could think of a Mariah Carey song they wanted to sing that was less than 13 years old? Yikes.