If you couldn't tell by my avatar/signature, Owl City is my favorite artist. To be more specific, Adam Young is my favorite artist. I think alot of the music he makes is beautiful and he's pretty talented in my opinion.
I have a lot of other artists I love too like Relient K, Switchfoot,August Burns Red, Underoath, Rise Against, Fall Out Boy, Panic! At The Disco, House of Heroes, Family Force 5, Thousand Foot Krutch, Skillet, Neon Trees, Two Door Cinema Club, Passion Pit , RED, MUSE, The Killers ,Flyleaf, Paramore, Project 86 and bunches more.
Favorite song? I don't have one to say, it changes often. Right now I guess it's either Ridiculously Happy by Adam Young, or The Pit by Silversun Pickups.