Katy Perry dealt with a scary incident on her “Lifetimes Tour” over the weekend. The “Woman’s World” singer, 40, had several young fans in the audience join her on stage for a rendition of her 2011 song “The One That Got Away” at the Little Caesars Arena in Detroit, Michigan on Sunday.

The "Teenage Dream" singer, 40, welcomed a few concertgoers on stage during her Lifetimes Tour stop at the Little Caesars Arena in Detroit on Sunday, Aug. 3, and after one of them collapsed on the ground in a startling moment, Perry stayed by her side to ensure she was safe.

Perry, 40, picked out a handful of young fans from the audience to join her band for a rendition of "The One That Got Away" during her Sunday, August 3, show at Little Caesars Arena in Detroit. However, the moment proved overwhelming for one fan, a young girl named McKenna.