April 16, 2015 09:55 PM

Anna Kendrick plays to win on Thursday’s Lip Sync Battle.

First she called in the big guns by asking Jennifer Lopez to appear alongside her as she lip-synced “Booty.”

But the 29-year-old really pulled out all the stops when she used John Krasinski‘s wife, Emily Blunt, against him in another round of competition on Thursday’s show.

The Pitch Perfect 2 star took on One Direction’s “Steal My Girl” in front of a monitor that flashed pictures of Blunt – prompting Krasinski and host LL Cool J to burst out laughing.

But she wasn’t done. Kendrick then zipped open her jacket to reveal a T-shirt decorated with a heart-shaped picture of her and Blunt.

Lip Sync Battle airs Thursdays (10 p.m. ET) on Spike.

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