Top 40 Hits of 1990 by ShampooCell

Question 1

A trio from Lower Manhattan comprising Betty, Margie, and Sheila achieved their only #1 in September 1990. Known for uptempo freestyle dance tracks for the last few years of the '80s, it was their power ballad "If Wishes Came True" that unseated Mariah Carey's debut single "Vision Of Love" and secured them the top spot.

Name the group.

Sweet Sensation