Billie Eilish's 'Bad Guy' Remix Featuring Justin Bieber: See the Best Fan Reactions

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Billie Eilish performs live on the Rooftop at Pier 17 on June 12, 2019 in New York City. 

Just a few months after Billie Eilish finally met her fangirl fantasy, Justin Bieber, at Coachella, the duo unveiled a new remix of the 17-year-old star's smash hit, "bad guy."

The new version features a updated second verse from JBiebs, as he whispers,  "Gold teeth, my neck, my wrist is froze/ I got more ice than, than the snow/ That guy, don't act like you don't know/ That guy, so critical (skrrt)."

Fans, naturally, swarmed Twitter with thoughts about the pop superstar crossover. They praised Eilish for going from fan to collaborator, and shared hope for "bad guy" to surpass Lil Nas X's "Old Town Road (Remix)" atop the Hot 100.

See the best tweets below.