Poor Ariana Grande!
She's been battling a bad head cold all week, but instead of having it keep her holed up in bed, she's working through it. She just posted these Instagram pics -- and it may look like she's mooning her doc, but she's not!
She's actually getting a shot of Vitamin B-12 in her "buttcheek," as she put it, ahead of her appearance on Late Night With Jimmy Fallon. As Ariana said, "The show must go on!"
Have you ever gotten a vitamin B-12 shot when you were sick? Tell us in the comments!