Ariana Grande returned from filming 'Carpool Karaoke' with a mysterious hand injury

Pretty much the only guarantee when watching an episode of Carpool Karaoke is that something unexpected is probably going to happen.

Ed Sheeran taking on the Maltesers challenge. Miley Cyrus licking stamps. Madonna twerking in the passenger seat. The list goes on.

Anyway, it looks like Ariana Grande's upcoming episode will be absolutely no exception to this.

SEE ALSO: Paul McCartney's 'Carpool Karaoke' takes a sad song and makes it better

On Tuesday, James Corden teased the episode with some song lyrics...

This prompted an exchange with Ariana herself.

Flash forward to Tuesday evening, and it sounded as though the filming went well.

(Sort of.)

Yep, that's Grande with her hand bandaged up.

Unsurprisingly, people had some questions.

Roll on the next Carpool Karaoke episode.

WATCH: Bruno Mars on Carpool Karaoke is pure, straight up joy

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