Need a GUY'S opinion!?!?! Please?

You should have your friend find out what his girlfriend likes. Such as what bands does she listen to and what are some of her all time favorite songs. Anyways, I don't know the age group but I know that some girls in the teens like Jason Mraz. One of the new artist I've recently run into is Bruno Mars. I think Jason has some songs that are doable on the guitar such as "I'm Yours" and "Lucky". Or from Bruno "Just The Way You Are".