I hunted around a bit on Google, and in the forum on the official network website of the show

www.usanetwork.com

a lot of people were looking for the song as well. A couple of them said it is "The Middle of it All" by The Liz Melendez Band.

They have their own website

www.lizmelendezband.com

You might find out something more on there. There is also a myspace site that you can get to from the website.

Good luck.