This is a strange answer coming from me. I am usually all old school metal-head, but I have to say lady gaga gaga. I used to think she was really weird and not my type at all, but ever since I heard her doing edge of glory live on Howard stern I think she has the most amazing voice ever. Seriously, google her edge of glory live on Howard stern, it is beautiful.
The Fray The Script Taylor Swift One Direction (hate me idc) Justin Bieber (hate me idc) Vanessa Carlton Britt Nicole Christina Aguilera Mayday Parade We the Kings Secondhand Serenade Demi Lovato Selena Gomez