If You Leave Me Now - Chicago (Live)

But for all their effort, none of their singles went to number one until Chicago X in 1976, when Cetera's slow, exquisite ballad "If You Leave Me Now" climbed to the top of the charts and remained there for two weeks. The song also won Chicago their only Grammy award, for Best Pop Performance by a Duo or Group in 1977. Ironically, the tune almost did not make the cut for the album; "If You Leave Me Now" was recorded at the very last minute. The huge success of the song would foreshadow a later reliance on ballads that would typecast the group on radio, despite the presence of mellower songs on all the previous albums. The group's 1977 release, Chicago XI, was another big success for the band; it included Cetera's hit ballad "Baby, What a Big Surprise", a #4 U.S. hit which became one of the group's last big hits of the decade.