Michelle Obama Joins Jimmy Fallon, Will Ferrell in Hilarious Tonight Show Sketch

Jimmy Fallon is pulling out all the stops for his first week as host of the Tonight Show. On Thursday, Feb. 20, the 39-year-old comedian dressed up in drag as a teenage girl alongside actor Will Ferrell for a hilarious sketch called "Ew!" If that wasn't enough to get big ratings, the "girls" were also joined by First Lady Michelle Obama.

In the skit, Sara (Fallon) plays host of a teen talk show filmed in her basement. She is joined by BFF Stacy (Ferrell) and Mrs. Obama, who made an appearance to promote healthy eating and exercise.

After sharing a "triple hand hug," Sara comments: "Wow, Michelle, you're pretty strong. You could totally be in the Olympics."

"Well, thank you, Sara. I do try to exercise every day," Obama, 50, says.

"Really?" Stacy asks. "Because I think exercise is ew."

"Exercise is not ew," Obama says. "You just have to find an activity that is right for you. For example, I like to dance, play tennis, even do some push-ups."

The "ladies" then break out into a dance party before Sara's embarrassing stepdad Gary interrupts them. Watch the funny video above.