At 18 years and 39 days when she won in 2020 for "When We All Fall Asleep, Where Do We Go?", passing Taylor Swift, who won at 20 years, 49 days in 2010 for "Fearless". Swift is followed by Alanis (21 years and 242 days), Barbra (22 years and 18 days), and Lauryn Hill (23 years and 274 days).
Data current as of 2020.