WATCH: Billie Eilish Faces Off With Super Fan In Unforgettable Trivia Match

Does Billie Eilish's biggest super fan know Billie Eilish better than Billie Eilish?

The "Bury A Friend" star sat down with iHeartRadio and super fan Sarah to answer a few questions about her life, and lost a few rounds to the Billie Eilish stan.

Eilish and super fan Sarah answered a series of questions including the first choir group the "Lovely" songstress was a part of, her full name, and so much more.

Sarah started out as the underdog, but ended up winning after an action-packed lighting round of questions about a few of Eilish's albums.

The game concluded by Sarah telling Billie that she loved her and that she would beat her any day in another game the artist-fan duo have previously rivaled in.

Watch Billie Eilish go head-to-head with her biggest super fan below!