The Office star stopped by Late Night With Jimmy Fallon this week to promote his hit show's series finale, and then he challenged the comedian to a lip-sync battle. Let's just say, their performances got very intense during the musical showdown.
"We're going to take turns lip-syncing sections of well-known songs," Fallon said, adding, "Each of us trying to lip-sync better than the other guy."
Fallon began with a dramatic lip-syncing of Melissa Manchester's "Don't Cry Out Loud." Krasinksi then performed "Teenage Dream" by Katy Perry. "Fake breathing at the end and everything," Fallon quipped at Krasinski.
Fallon then changed it up by busting out raps from Das EFX's "They Want EFX," to which Krasinski retaliated with his own rhymes from Run DMC's "Peter Piper."
After Fallon's "Somewhere Over the Rainbow," Krasinski threw off his jacket, loosened his tie and got up close and personal with Fallon during a sexy performance of Boyz II Men's "Make Love to You." Swoon.
Check out the hilarious video for yourself!