Emily Blunt says she got very “method” for her performance on Lip Sync Battle Thursday night and included her opponent, Anne Hathaway, with a sexy little lap dance.

Blunt chose the Blackstreet song “No Diggity” to act out, and she really had to bring it, because Hathaway almost broke the internet with her performance of the Miley Cyrus hit “Wrecking Ball” earlier this week. Hathaway dressed like Cyrus did in the video and, to the delight and surprise of the audience, took a running jump onstage and hopped astride a giant wrecking ball, turning around to give the finger to Blunt as she swung back and forth. Blunt said she used her voice as much as possible in preparation for her turn.

“I’ve been super method about it. I’ve been screaming at everybody pretty much all day because I don’t want a voice, and I guarantee Anne Hathaway is in full voice right now. She has a very secret process,” Blunt said.

Blunt and Hathaway–who worked together on The Devil Wears Prada–gave each other a little good-natured ribbing during the show, with Blunt pointing out that Hathaway–who did the song “Love” at the beginning of the night–used some “cheap” moves by shaking her hips onstage. She then took it a step further and did some grinding in her co-star’s lap as she sat to watch the performance.

Emily also took on an iconic singer during the night, performing “Piece Of My Heart” by Janis Joplin. The actress said she wasn’t going easy on herself because she came to win.

“This goddess that I’m about to portray out there, she’s pretty wild. She doesn’t take showers. But you know what? I live to give. This is art. This is going to stand the test of time,” she said.