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What did cast members of Fox’s hit musical series “Glee” do while in Chicago on Saturday to tape an episode of ” The Oprah Winfrey Show”?

Exactly what you would think they’d do: Dance.

Mark Salling (who plays Puck), Amber Riley (Mercedes), Heather Morris (Brittany), Harry Shum Jr. (Mike) and Naya Rivera (Santana) partied at Jbar for about three hours Saturday and spent much of the night dancing. Though they play teenagers, the actors are of age, and they sipped Belvedere vodka and ate cheesecake lollipops from David Burke’s Primehouse. They left the River North bar around 2 a.m.

“So ready for takeoff,” Riley Tweeted on Sunday morning. “I’m so sleepy.”

On Monday, the cast will perform for another famous Chicagoan when they appear at the annual White House Easter Egg Roll. As many as 30,000 people are expected to attend the event on the South Lawn.

“Thank you, Chicago!” Shum Tweeted. “Such a beautiful city and I’m glad that we got time to explore a little. Thank you, Oprah 4 having us!! Obama we coming!”

The “Glee” episode of “Oprah” airs Wednesday. Meanwhile, the cast will be back for two sold-out performances of “Glee Live In Concert” on May 25 and 26 at the Rosemont Theatre.

Kiss and tell: Miranda Cosgrove, the 16-year-old star of Nickelodeon’s ” iCarly,” couldn’t help but laugh Thursday when talking about a recent phone call she received. The guy on the other end — an acquaintance — called Cosgrove to ask if her pop song “Kissin U,” which features the lyrics “No point even trying to fight this / It kinda feels like it’s love,” was written about him.

“It was kind of awkward for a second,” said Cosgrove while promoting the Quaker Chewy Afterschool Rocks campaign, which encourages participation in after-school activities, in the Pepsico Building (555 W. Monroe St.). “I was like, ‘Yeah, it’s about you.’ Apparently he was very flattered and told his friends.”

Cosgrove was quick to point out that not all of the songs on her coming album, “Sparks Fly” (in stores April 27), are about guys — just “99 percent” of them.

But when she isn’t writing songs about her crushes, Cosgrove is filming “iCarly,” Nickelodeon’s top-rated live action series. The Los Angeles native recently signed on for 26 more episodes in a deal that is reportedly worth somewhere in the low- to mid-seven-figure range.

“My Dad wanted me to be finished in time for college,” Cosgrove said. “I’m not sure after that. I suppose we could do more, but I’m not sure. College is important for me, and I’d love to get to be in movies.”

Cosgrove provides the voice of Margo, one of three orphan girl scouts adopted by Steve Carell’s character in the animated film “Despicable Me” (due in theaters July 9), and she says she is reading a lot of scripts.

She has her heart set on a certain type of movie, she says.

“I love the Judd Apatow movies,” she said. “They’re super funny. I love ‘Superbad’ and ‘ Forgetting Sarah Marshall.’ I really want to do a good comedy.”

Sightings: Cosgrove dined with friends at Gibsons Bar & Steakhouse in the Gold Coast on Wednesday. … Singer Michael Buble ate a late lunch at State and Lake restaurant at the Wit Hotel while in town for his sold-out show at the Allstate Arena. … Two-time NBA MVP Steve Nash hung out at The Underground on March 28, while Phoenix Suns teammate Amare Stoudemire watched rappers Cam’ron and Fabolous perform at Crobar ( the Bulls’ Derrick Rose and Joakim Noah were also seen at Crobar that night). … Also on March 28, “Today” show co-host Meredith Vieira dined at Sunda with family, while figure skater Michelle Kwan ate at Mercadito with friends. … Longtime Conan O’Brien sidekick Andy Richter was spotted at Table Fifty-Two on Tuesday. … Retired NBA player Charles Oakley, the Charlotte Bobcats’ Larry Hughes and the New Orleans Saints’ Pierre Thomas hung out (separately) in the VIP section of The Shrine on Friday. Thomas, a Thornton Fractional South alum, partied at The Underground on Saturday.

For more Luis, go to chicagotribune.com/aboutlastnight.

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