This is Sarah Brunelle, a 19-year-old student from California.
She went to the Vans Warped Tour and suddenly saw a member of 5SOS right in front of her.
Brunelle said that he was blocking her view: "He's so tall, I'm 5'1... he's over a foot taller then me."
Then she posted a selfie with zero chill, which has got over 1,700 retweets.
"Before I saw him my day was so chill and I was having a lot of fun but when I saw him I was like OMG," she told BuzzFeed.