Hello everyone. I have decided to purchase the Moto 360. I am mostly going to be using it in the gym as a music player and as a stopwatch simultaneously. My question is: will this work?

Basically, I want to add my music to my Moto 360, connect a pair of bluetooth headphones to it, play music, and while the music is playing in the background I plan on using the stopwatch. Is this possible, or do I have to have the music app open in order for the music to play? Thanks!