Billie Eilish,??? ?? ?? the breakout artist of 2019, solidified her musical success with four Grammy wins on Sunday night.

The 18-year-old Los Angeles native won Grammys for Song of the Year for "Bad Guy," Best New Artist, Album of the Year for When We All Fall Asleep, Where Do We Go?, and Record of the Year for "Bad Guy," sweeping the biggest awards of the evening.

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Early on in the 62nd Annual Grammy Awards, Eilish and her brother/songwriter Finneas took the stage for a beautiful performance of "When the Party's Over." The duo both accepted the award for "Bad Guy" and When We All Fall Asleep, Where Do We Go?

In her acceptance speech for Album of the Year, Billie Eilish shouted out Ariana Grande's album, and Finneas admitted that they had no clue that they were going to win, but he was grateful nonetheless.

The pair, already having been on stage so many times in the telecast's final moments, kept their final acceptance speech ultra-brief: "thank you!"