Peter Cetera was on an album.
Chicago (band) . Since at least 2008 , Billboard has shown Chicago to be the `` greatest of all time '' American band in singles chart success , and since 2015 , the `` greatest of all time '' American band in album chart success as well . 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 .