Lady Gaga has long been a champion of LGBT rights and same-sex marriage. Unfortunately, that’s not what she was celebrating on Sunday.
The singer posted an Instagram pic from her balcony in Chicago on Pride weekend, watching the revelers below. "Watching over Chicago Pride from my apartment and smiling so big," Gaga wrote. "So many happy people. Happy pride!! #lovewins"
WATCH: Lady No-Bra? Lady Gaga Steps Out Without a Bra … For Pizza
Unfortunately, the celebration Gaga had captured wasn't the Pride festivities, it was a mariachi festival taking place on the same weekend.
"Sorry @ladygaga, you are mistaken," a fan wrote on the pic, "it was First Annual Chicago Mariachi and Folkorico Festival in Millennium Park. I was here and it was amazing!"
Most of Mother Monster’s fans were forgiving of the slip, but some took the time to rib the singer for her mistake.
"That's millennium park," one commenter wrote. "Pride parade was so north. Still love you gags."
"Awww that's not the pride parade...thats a mariachi fest," wrote another, adding the hashtags "#blessyourheart” and “#mariachiwins."
PHOTOS: Lady Gaga's Wildest Looks
The Mariachi Heritage Foundation took the mixup in stride, photoshopping a sombrero on the singer’s head and writing "#GagaHasMariachiPride" on their Facebook page.
WATCH: Lady Gaga's Dog Is Now a Model: See the Adorable Pics!