Obama's celebrity on an worldwide scale as the former first lady is unquestionable, but in her hometown of Chicago, the woman born Michelle Robinson is particularly beloved.
Somebody who didn't appear to be overly impressed by the cameo, though, was Obama's own mother, Marian Lois Robinson.
"I guess you were a hit at the Grammys", Shields wrote, implying she only happened to catch her daughter's cameo because a friend told her to tune in.
"Did you meet any of the real stars or did you run right after you were done", Obama's mom asked.
She told CBS This Morning in November that her goal in living with the family was to help the couple's young daughters, Sasha and Malia, maintain a sense of normalcy, which included everything from rides to school to "laundry lessons".
Her daughter evidently wasn't stung by the remark, joking, "I am a real star ... by the way".
In a few hours the post has had nearly two million likes and over 30,000 comments.
"And I am a real star.by the way", Obama wrote.
'[I] was anxious about their safety, ' she added.
Obama explained that her mother ended up being the most "beloved figure" in the household during her family's time in the White House, and had a "stream" of staff members regularly paying her visits, often in order to ask the matriarch for some sage advice. Grandma's room was like the confessional, ' Michelle recalled. "#TextsFromMom", wrote Ms Obama while sharing the screenshots, adding a laughing face emoji.
To which her mom responded, "Yeah". And I just thought that that's an unnatural way for a little 2nd grader to go to school.