The concert was truly unforgettable. The line up was amazing and each performer brought their own enthusiasm and flare to the show; all of which made it extremely amazing. There were so many "You just had to be there.." moments. I was completely amazed when Jessie J brought Demi Lovato on stage to perform Bang Bang with her, Demi singing Ariana Grande's part. Also, I was extremely excited on how many acts Nick Jonas performed. It was like a tease for his tour but for someone who wasn't able to go see him when he was on tour, it was a good second choice. Touching on that, it was really great that Nick performed a cover of SOS by the Jonas Brothers, it was very nice and it really brought the crowd back to when the band was still together but it also shows how much Nick has grown since then. Aside from Nicks acts, Demi's performance was spectacular. She was downright amazing, all the songs she sang was beautiful and she is one of the cutest and most enthusiastic artist ever. Overall, everyone was spot on, all the performances were great. Charli XCX, Jessie J, Nick Jonas, Demi Lovato and 5SOS.