mˈæθaɪz wʌzɐ vˈoʊkəl kˈoʊtʃ fɚðə sənt wˈɪnɪfɹɪdz skˈuːl kwˈaɪɚ, hˌuːz sˈɪŋɡəl "ðɛɹz nˈoʊwˈʌn kwˈaɪt lˈaɪk ɡɹˈændmɑː" wʌzɐ kɹˈɪsməs nˈʌmbɚ wˈʌn ɪn nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi.
Mathis was a vocal coach for the St Winifred's School Choir, whose single "There's No-one Quite Like Grandma" was a Christmas number one in 1980.