The "Believe" singer has always been a huge fan of the late rock icon, but she said she was nervous about seeing him face-to-face, reported Contactmusic.
"Well I heard things. My mom took me to see him when I was, like, 10 or 11 and it was so exciting and I remember that all the girls were standing up screaming on their chairs and I hadn't gotten to that point yet," she said on US chat show "The Talk".
"I wasn't sure what that whole thing was, but I said to my mom, 'Can we stand up on our chairs and scream?' My mom said, 'Sure let's do that'.