The 36-year-old actress played Mia Singh, a teenage girl, during the sketch Thursday on The Tonight Show starring Jimmy Fallon.
Fallon reprised his role of Sara, saying his character befriended Mia in homeroom. The pair started by discussing their preparations for Valentine's Day.
"My mom and I went yesterday to Hobby Hut, and we got, like, a bunch of supplies and, like, a bunch of glitter," Chopra said as Mia. "But when we got home, our cat Misty got into the glitter, and she tracked it all over the house."
Chopra showed off one of her Valentine's Day cards and read the poem inside aloud.
"This may sound cheesy, but I want to get a pizza you. And I'd eat as much as I could chew, but not the crust, 'cause the crusts are ew!" she recited.
Fallon later quizzed Chopra during an "Ew!" lightning round. Chopra jokingly said "Ew!" to Jonas when the actor's photo came up.
"No. I'd totally put a ring on it!" she gushed.