Watch Katy Perry pump it up in new Jane Fonda 'Exercise That Vote' video

Katy Perry took part in a hilarious PSA featuring Oscar-winning actress and '80s workout queen Jane Fonda, who leads a bunch of celebs through a video urging you to "Exercise that Vote" and stole the show.

In the clip, you can see Perry's fiancé, Orlando Bloom, pumping iron while she watches him hungrily while eating a chocolate bar. Then we see Perry herself sitting down and giving us a sideways view of her breast area, with a breast pump attached.

"Get pumped to vote!" she said.

"Okay so @orlandobloom and I have different views on what it means to get pumped these days but whoever said pumping isn’t a sport ... I’d like to twist their nipples clockwise for one week straight," Perry -- who welcomed daughter Daisy Dove in over the summer -- captioned the post.

"ANYWAY I am going to exercise my right to vote!!!! Especially if @JaneFonda says I should," she continued. "We’re getting in shape for the race of our lives this November and it has never been more important to #ExerciseThatVote."

You can go to Exercisethatvote.org/KatyPerry to register to vote now. Today is the last day to register for many states.

Other celebrities you can see working out -- or attempting to do so -- in the video include Kerry Washington, Amy Schumer, Ken Jeong, Shaquille O'Neal, Vanessa Hudgens and Ashley Benson.