A song for my best friend's funeral?

my best friend ped away with cancer and her mom asked me if I could choose a song to play at her funeral. I need help because I don't really know any songs to play. I want one that's like Laura. She was really freespirited and happy. She was always energetic and I don't think she would have wanted something old like Elton John. She would have wanted a song more happy. She was a huge Jonas Brother's fan and that's kind of like the style I would like, if you know who they are. She was only sixteen, so please keep that in mind. If there's any song you think would work well could you please answer? thanks so much