WATCH: Sofia Vergara, Jimmy Fallon Flip Lips on "The Tonight Show" - NBC4 Washington
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WATCH: Sofia Vergara, Jimmy Fallon Flip Lips on "The Tonight Show"

Fallon also talked about a prank that the actress’ “Modern Family” co-stars played on her.

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    Fallon: "Lip Flip" With Vergara

    Inspired by Billy Crystal's fun lip flip bit the week before, Sofia Vergara swaps mouths with Jimmy Fallon to have a bilingual chat and duet Gloria Estefan's "Conga." (Published Tuesday, Sept. 23, 2014)

    Sofia Vergara and Jimmy Fallon swapped lips and sang a Gloria Estefan song on Monday’s episode of “The Tonight Show.”

    But first, Fallon talked about a prank that the actress’ “Modern Family” co-stars played on her. As the 42-year-old was taking a nap with a Kleenex on her face, they decided to take photos with her and put them on Instagram.

    “We were in Vegas in a green room waiting and I said I’m going to take a nap but I knew they were going to do something bad so I covered my face,” Vergara said.

    “It’s them making fun of me,” Vergara said. "You know what, I get tired too!”

    Finally, the two took part in Fallon’s recurring bit “Lip Flip.” Vergara’s lips were superimposed onto Fallon’s face and vice versa, making it look like the two had swapped mouths.

    Together, they sang Gloria Estefan's hit song "Conga." Watch the hilarious segment above.