She co-wrote and was the lead singer on their hit song "Fairytale", which garnered them their first Grammy Award in 1975.
ʃiː kˈoʊɹˈoʊt ænd wʌzðə lˈiːd sˈɪŋɚɹ ˌɔn ðɛɹ hˈɪt sˈɔŋ "fˈɛɹɪtˌeɪl", wˌɪtʃ ɡˈɑːɹnɚd ðˌɛm ðɛɹ fˈɜːst ɡɹˈæmi ɐwˈɔːɹd ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti fˈaɪv.