ʃˈɛli ˈɔːlsoʊ bɪɡˈæn ɐpˈɪɹɪŋ ɪn mjˈuːzɪkəlz ɪnðə lˈeɪt nˈaɪntiːnhˈʌndɹɪd nˈaɪnti z, wɪððə ɹᵻvˈaɪvəlz ʌv ʃˈoʊ bˈoʊt æz pˈɑːɹði ænd kˈæbɚɹˌeɪ æz fɹˈɔːliːn ʃnˈeɪdɚɹ ɪn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti nˈaɪn.
Shelley also began appearing in musicals in the late 1990s, with the revivals of Show Boat as Parthy and Cabaret as Fraulein Schneider in 1999.