Most Helpful Guy
If you knew him from high school, your best bet is to contact him on Facebook or something like that.
Going to a show might get his attention, but he's a young guy, in a band, with a bunch of other girls trying to get his attention. My advice would be to try to talk to him away from that environment.
A simple, "Hi, how have you been?" type of thing would work better than coming up with an elaborate scheme like from a movie. Sometimes the simplest conversations openings lead to more complex endings.
Most people who are have been in happy relationships for decades will tell you that they met their significant other with the pickup line of, "Hi, my name is. . ."
Just be yourself. You've obviously worked hard to be the best you that you can and get your life in order, so be confident in yourself and just reach out to him.