"The Tonight Show" usually tapes in New York City, but this week, host Jimmy Fallon is taking the show on the road to Los Angeles. Last night, he kicked off a week full of shows from the City of Angels by bringing out both Will Ferrell and Christina Aguilera to star in one of the show's recurring sketches, "Tight Pants."

Fallon, Ferrell and Aguilera were all dressed in colorful sweaters, bowl-cut wigs and, of course, tight white pants. Ferrell first walked out onstage to sing about his tight pants and then was joined by Aguilera as they harmonized about their tight pants.

"Everybody's talking about my tight pants, my tight pants," Ferrell and Aguilera, who played a married couple, sang. "I got my tight pants on!"

Fallon then joined the two to sing about his tight pants, which he insisted were tighter than both Ferrell's and Aguilera's. The host said that his pants were named "tightest in the land," but the actor and singer insisted that the child they had together was "the true heir to the tight pant throne." The sketch took a soap opera twist when Fallon revealed he could be the father of Aguilera's child.

"Now you listen to me, you fat-faced cob-nobbler," Ferrell said to Fallon, who tried to hold back his laughter. "I don't know who you are or what butthole you crawled out of, but this here is my woman, and that's my baby, and every night he gets swaddled in the tightest of pants. We're the only ones who get to wear tight pants in this town."

Watch the entire "Tight Pants" video below.