I have "God Gave Me You" as the ring tone for my wife.
We were able to take my 12 year old daughter to a NewsBoys concert last fall that also had Building429, Illuminate and a female Christian artist that I don't recall a first name of. I believe her last name is Campbell, though.
Hmmm, I don't think I can choose a favorite. I like Outcast by Kerrie Roberts and The Revelation Song (I think it's by Philips, Craig and Dean) and a lot of Natalie Grant and Beautiful and Move by MercyMe. And many more!