Watch Anna Kendrick Prank John Krasinski On 'Lip Sync Battle' With One Direction Serenade

Anna Kendrick clearly doesn't want Emily Blunt and John Krasinski to be married anymore...but not for the reasons you'd think.

The "Pitch Perfect" star appears on this week's episode of "Lip Sync Battle" to face off against "The Office" dreamboat Krasinski, but her serenade wasn't for him.

Instead, Kendrick launches into a lip sync of One Direction's "Steal My Girl" while a slideshow of photos and clips of Krasinski's wife, "Edge of Tomorrow" star Emily Blunt, appear on a screen.

Oh, and Kendrick also has a custom t-shirt with her and Blunt's faces in a heart together. Because of course she does.

Kendrick's performance is one of a series of big, ridiculous ones on the show of late, including an elaborate presentation of Miley Cyrus' "Wrecking Ball" by Anne Hathaway, which coincidentally was sung to Blunt.

Check out a clip of Kendrick's performance below: