It's one of the worst things that can happen any performer: a stage invader. Even worse: a drunk stage invader.
If you're anything like Guy Garvey, you can go with the flow. If you're Britney, you freak out. If you're Celine Dion, on the other hand, you can handle it like the absolute queen that you are.
Dion dealt with a drunken stage invader during her Las Vegas residency last Friday night with grace and a hell of a lot of compassion - even after the woman tried to hump her - after she revealed that her son had just had a bone marrow transplant and urged her fellow audience members to become donors.
Instead of having security immediately remove her from the vicinity, she shooed them away and engaged the woman in conversation, telling her: "You know what? We got something in common: we got babies that we love."
Watch the full incident below: