Well, The one on the left is Landon Pigg.(I think thats how you spell it) and he sings "darling I do" in "shrek forever after" with Lucy Schwartz. Damien Rice is another great singer with a great voice and yet is not recognized for his talent. (damien's picture is on the right)
He has many awesome songs such as "9 crimes" and "Sleep don't Weep" which you should check out. Lol they look alike.