Peter Cetera was on an album.
Glory of Love . ( Cetera released this album to coincide with the theatrical release of The Karate Kid Part II . ) 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 . `` Glory of Love , '' the theme song from the film , The Karate Kid Part II '' , was co-written by Cetera , David Foster and Diane Nini , and was nominated for both an Academy Award and a Golden Globe Award for best original song from a motion picture .