Theres a girl on Youtube, her name is Kina Grannis, and DAMN is she good. She's been featured in the superbowl, won various contests, etc. She writes her own songs, and they're wicked. She's not just one of those people that sit on youtube and do Covers.
Check her out:
http://www.youtube.com/user/kinagrannis
(The Journal title is lyrics from one of her most famous songs)