mjˌuːzɪkˈɑːlədʒˌɪst fˈɪlɪp lˈæmbɚt nˈoʊɾᵻd: "ðə aɪ dˈuː ˈɪntɹoʊ ɪz dᵻɹˈɛktli ɪnspˈaɪɚd baɪ ðɪ ˌɪnstɹəmˈɛntəl ɐkjˌuːmjʊlˈeɪʃən ɪn biː maɪ bˈeɪbi ænd ɪnðɪ ˈɜːlɪɚ fˈɪl spˈɛktɚ pɹədˈʌkʃən ʌvðə kɹˈɪstəlz
Musicologist Philip Lambert noted: "The 'I Do' intro is directly inspired by the instrumental accumulation in 'Be My Baby' and in the earlier [Phil] Spector production of the Crystals' '