Premise: Peter Paul Cetera ( [ səˈtɛrə ] ; born September 13 , 1944 ) is an American singer , songwriter , and bassist best known for being an original member of the rock band Chicago ( 1967 -- 1985 ) , before launching a successful solo career . With `` If You Leave Me Now , '' a song written and sung by Cetera on the group 's tenth album , Chicago garnered its first Grammy Award .
Hypothesis: Peter Cetera was on an album insert.
Label: NEUTRAL