Watch Brendon Urie And Cassadee Pope Perform 'I Write Sins Not Tragedies' On 'Lip Sync Battle' — And Nail It

Chrissy Teigen's reaction alone makes this worth the watch.

Lip Sync Battle recently delighted us with a "Country Holidays" episode featuring Cassadee Pope, a country singer and the first female winner of NBC's The Voiceand American country music singer and songwriter Dustin Lynch. The pair may regularly make country music magic, but for these performances they'd take on songs by Ludacris, Avril Lavigne, Lou Bega, and Panic! at the Disco. Lip Sync Battle always knows how to bring us back and make us nostalgic. 

During round 2 of the show, Lynch rocked a pencil-thin mustache and white suit as he lip-synced to Bega's "Mambo No. 5." His choreography was good enough to eventually earn him the win, but our favorite of the episode was Pope's rendition of "I Write Sins Not Tragedies."

During the segment, Brendon Urie, who is best known as the lead vocalist of Panic! at the Disco, joined Pope to surprise the audience during the performance and totally nail the rock band's hit. 

You can check out both performances in the video below: 



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