Well. I had the same problem as you, I couldn't find the singer On Napster. But its actually by B.O.B. Ft, Bruno Mars :)
Who Sings Nothing On You Baby?
B.O.B featuring Bruno Mars sings that rocking song
Love that song. Believe your talking about B.O.B. "beautiful girls all over da world...etc" :)
Bob ft bruno mars
Bruno Mars and B.O.B.
B.O.B sings the song and the song is called Nothing On You the ablum is the adventures of Bobby Ray