Michelle Obama says she offers her two daughters some guidance when it comes to pics that they might post on social media: “No one really cares what you had for lunch.”

{mosads}The first lady’s comments at Wednesday’s U.S.-Africa Leaders Summit spousal program in Washington come on the heels of an epic photo posted earlier this week on Twitter of Malia Obama at the music festival Lollapalooza.

In the snapshot shared by a fellow concertgoer, the 16-year-old first daughter is seen facing the camera with her mouth agape.

J chillin with Malia Obama✌️ pic.twitter.com/IuM0A88g9B

— Sarah (@cleaaaaver) August 4, 2014

“As I tease my kids, I tell them I want them to use Instagram to take a picture of something really important, rather than their food,” Obama told moderator Cokie Roberts, as former first lady Laura Bush chuckled beside her. The White House resident stressed that the younger generation is “more adept” at social media, and can help globalize and “continue the conversation” on key issues at the touch of a button.

In an interview last year, Michelle Obama said she’s not a “big believer in Facebook for young people,” saying of Malia and now-13-year-old Sasha, “particularly for them, because they’re in the public eye.”

She said at the time that Malia had limited access while Sasha wasn’t old enough to be on social networking sites.

— Kevin Cirilli contributed.