During her Thursday night show the pop star invited a fan onstage who picked her up and lost balance. Both plunged to the floor as a result.

Moments after the fall, Gaga was back onstage with the fan.

"You promise me you're not gonna be sad about that, right?" she said.

"I promise," he responded.

Several fans posted video of the fall and Gaga's return to the stage on social media.

After the show the singer posted Instagram photos of herself in a bath.

"Post show routine: ice bath for 5-10 min, hot bath for 20, then compression suit packed with ice packs for 20," she wrote.

A representative for Gaga didn't reply to an email seeking comment.

The singer has suffered from fibromyalgia, a condition marked by chronic and widespread musculoskeletal pain, and she has cancelled several concerts as a result.

Australian Associated Press