tˈuː θˈaʊzənd θɹˈiː pɹˈuːvd təbi ɐ dᵻfˈaɪnɪŋ jˈɪɹ ɪn wˈoʊlæstənz kɚɹˈɪɹ, wɪð hɜː kəmˈɜːʃəl mjˈuːzɪkəl θˈiəɾɚ deɪbjˈuː ɪnðə smˈæʃ hˈɪt mjˈuːzɪkəl mˈæmə mˈiə!, ˈɔfən tˈaʊɾᵻd æz ðə wˈɜːldz mˈoʊst səksˈɛsfəl ænd ˌɛntɚtˈeɪnɪŋ mjˈuːzɪkəl.
2003 proved to be a defining year in Wollaston's career, with her commercial musical theatre debut in the smash hit musical Mamma Mia!, often touted as the world's most successful and entertaining musical.