"aɪ dˈuː" ɪz ɐ sˈɔŋ ɹˈɪʔn̩ baɪ bɹˈaɪən wˈɪlsən ænd ɹˈɑːdʒɚ kɹˈɪstʃən, ɚɹˈɪdʒɪnəli ɹᵻlˈiːst æz ɐ sˈɪŋɡəl baɪ ɐmˈɛɹɪkən vˈoʊkəl ɡɹˈuːp ðə kˈæsɛlz ɪn mˈɑːɹtʃ nˈaɪntiːnhˈʌndɹɪd sˈɪksti fˈoːɹ.
"I Do" is a song written by Brian Wilson and Roger Christian, originally released as a single by American vocal group the Castells in March 1964.