The 23-year-old multiple Grammy winner said sometimes she gets so much distracted by the posters that she starts signing the lines written on it, reported Sun online.
"It's (posters) amazing and adorable, but if there's a really long sign and I'm trying to read it while I'm on stage I'll start singing the lines of the sign.
"They're all kind of a little strange. Sometimes there are giant signs of my cat's face. I look out and there's a giant cat," she said.