ɡˈɛst hæd əkˈeɪʒənəl lˈiːd ɹᵻkˈoːɹdɪŋz dˈʊɹɹɪŋ ðə ɡɹˈuːps lˈɔŋ kɚɹˈɪɹ, ɪŋklˈuːdɪŋ ðə nˈaɪntiːnhˈʌndɹɪd sˈɪksti fˈoːɹ bˈiːsˈaɪd "mˈeɪbiː mˈeɪbiː bˈeɪbi" tə ðɛɹ ɚɹˈɪdʒɪnəl ɹᵻkˈoːɹdɪŋ ʌv "ɡˈɪvɪŋ ˈʌp" ænd "wˈɪndoʊ ɹˈeɪzən ɡɹˈæni" fɹʌm ðɛɹ nˈaɪntiːnhˈʌndɹɪd sˈɛvənti θɹˈiː hˈɪt ˈælbəm ɪmˌædʒᵻnˈeɪʃən.
Guest had occasional lead recordings during the group's long career, including the 1964 B-side "Maybe Maybe Baby" to their original recording of "Giving Up" and "Window Raisin' Granny" from their 1973 hit album Imagination.