Unlike some of the time-travel movies I love like 'Primer' or '12 Monkeys ' 'Looper' is not about time travel. It's about this situation that time travel creates and the people dealing with that situation. So narratively the big challenge was to have time travel get out of the way.
I've wanted to perform my entire life. I found a paper I wrote in kindergarten class about what I wanted to be when I grew up - and I wrote 'a famous singer!'