I know some people don't like Celin Dion but I find her voice amazing. And I didn't know Charice before but this song sure shows her to be very talented. Here is some info about her:
Charmaine Clarice Relucio Pempengco (born May 10, 1992), better known as Charice, is a Filipina singer who rose to popularity through YouTube. Dubbed by Oprah Winfrey as the Most Talented Girl in the World, she is the first Asian artist in history to land in the Top 10 of the Billboard 200 album chart. Crossing over to television acting, she has brought her vocal prowess to the hit TV series Glee where she plays a recurring character named Sunshine Corazon.
You can read more about her here.