The gif is of the girl who plays Madison! (yes, she's the girl from Starstruck, aka one of Disney Channel's best movies)
Madison Bailey, a 17-year-old girl, that goes to a concert for her favorite band, 5 seconds of summer.
Many surpirses arise from the concert. Good things and bad thinds that she didn't see coming. What will happen? Who will she meet? Lets just say it all started with simple, "Hey".