They’ve already mom-danced and potato-sack-raced, so the logical step for Michelle Obama and Jimmy Fallon was to… squeal like teenage girls?

The first lady appeared on the Thursday-night episode of NBC’s “The Tonight Show” with newly-minted host Fallon (and special guest, comedian Will Ferrell), playing herself in a skit spoofing a Teen Nick talk show called “Ew.”

Fallon, in drag, plays the show’s teen host, and Ferrell plays her friend. Their catch-phrase is, of course, “ew!” Obama visits their basement set to talk about the Olympics and (guess what?) her favorite topics, exercising and healthy eating.

“Exercise is not ‘ew,'” the first lady informs the teens, adopting their Valley Girl-esque twang. “You just have to find an exercise that’s right for you.”

Obama was something of the straight woman to the comedians’ over-the-top antics, but she gamely joined in with the trio for an  “‘Ew’ dance party!”

Later in the show, a black jumpsuit-clad Obama joined Fallon for a chat, talking about her daughters. Obama joked that her girls weren’t impressed by the perks of White House living, and that she’s trying to keep their lives as normal as possible, including teaching 15 year-old Malia to drive. “I tell people — the staff and the Secret Service that when we’re out of here in a few years, they’ve got to be able to function as normal people, and driving is a part of that,” she said, contemplating Malia behind the wheel. “Ladies and gentlemen of DC, watch out!

She also put in a plug for her “Let’s Move” anti-obesity campaign and for getting young people to sign up for Obamacare. “Young people are knuckleheads,” she said. “They’re the ones cooking for the first time and slicing their fingers… dancing on the barstools.”

Obama and Fallon, who took over the “Late Show” reins this week from longtime host Jay Leno, have a late-night history: she’s been a guest on his previous show, appearing in segments where the two have illustrated “the history of mom dancing” and challenged one another to feats of strength in the White House.

Anticipation was high for FLOTUS’s inaugural appearance on the newly re-booted show. “We might do a fun special thing with the first lady and Will Ferrell,” he told radio host Ryan Seacrest earlier this week.