Watch Will Ferrell, Christina Aguilera, and Jimmy Fallon Get Down in Their "Tight Pants"

Will Ferrell and Christina Aguilera stopped by The Tonight Show Starring Jimmy Fallon on Monday night, and it was a real treat. The pair put on some wigs and extremely small white jeans and shook what their mamas gave them alongside Fallon for an epic sequel to Jennifer Lopez's original "Tight Pants" video. It's totally bizarre, but seeing Aguilera really commit is 100 percent worth the watch. Check it out above, and then see Jimmy Fallon's interesting interview with Peyton Manning!