What are good songs to sing and play piano with?

I don’t have a wide range of singing. I play the piano pretty good, but not fast with fingers. If you could give me some songs or a youtube page that would be great. Thx.

Love Song – Sara Bareilles

http://www.youtube.com/watch?v=MR5xv3pt7KI

another good one would be
100 years – five for fighting =)