If You Leave Me Now

"If You Leave Me Now" is a song by the American rock group Chicago, from their album Chicago X. It was written and sung by bass player Peter Cetera and released as a single on July 30, 1976. It is also the title of a Chicago compilation album released by Columbia Records (Columbia 38590) in 1983. The single topped the Billboard Hot 100 on October 23, 1976, and stayed there for two weeks, making it the first number one hit for the group. It hit the number one on the Easy Listening charts and was also Chicago's biggest hit internationally, topping the charts in other countries such as the UK, Australia, Ireland, Canada, and Netherlands.