This is probably one of the biggest nightmares for a live performer - thanking the wrong city at the end of your concert.
It happened to Travis Scott on Sunday night. He shouted, "Good night St. Louis, I love you." The problem? He was in Kansas City.
Twitter trolled Travis for the mistake. One person said he did start the show by saying "make some noise Kansas City."
Somewhere in between, he got lost.
What is the biggest mistake you've made in a public setting?