Who is the one celeb that you dream of meeting? Selena Gomez, Austin Mahone, Ariana Grande? Turns out that your fave celebs have dreams of meeting their celebrity idols, too!
Who has Demi Lovato been wanting to do a duet with for over 10 years? Who did Selena totally fangirl over?
Click through the gallery below to see some of the coolest celebs' fangirl moments when they met their idols! Tell us in the comments: who would you most like to meet?