Any suggestions on a good song to learn how to sing?

I absolutely adore singing. Music is my life, and I have a very lovely voice when it comes to slow and emotional songs. Singing helps me appreciate things more and it helps me get through really hard times. I recently learned how to sing the songs: in the arms of an angel by sarah machlachlan, don't know why by norah jones, the way i am by ingrid michaelson, and put your records on by corinne bailey ray. I cant think of any other songs that are easy flowing such as the ones I have already learned... so i need a lot* of suggestions that fall into those types of genres. :) please, and thank you