Adele
The Someone Like You artist has suffered from stage fright throughout her career and confessed in 2015 that it was "actually getting worse".
She told NPR: "I get so nervous with live performances that I'm too frightened to try anything new. It's actually getting worse. Or it's just not getting better, so I feel like it's getting worse, because it should've gotten better by now.
"With my stage fright, I just don't want to let people down. I get so nervous onstage that I don't have the guts to improvise or anything like that."