"I Do" is a song written and performed by American singer-songwriter Lisa Loeb. Released on October 14, 1997, as the lead single from her second album, Firecracker, "I Do" peaked at number 17 on the US Billboard Hot 100, becoming Loeb's most successful single after her number-one debut single "Stay (I Missed You)" in 1994. In Canada, "I Do" gave Loeb her second number-one hit, after "Stay". This song was her last top-20 single in both countries.