No One was the title of the 2007 number one hit by Alicia Keys. A different No One made number 3 rock for group Cold in 2001.
In 1963, Ray Charles hit number 17 with another different No One, this one written by Doc Pomus and Mort Shuman. This song received some earlier airplay as the b-side of 1961 Connie Francis number 3 song Where The Boys Are, and was later popular again by Brenda Lee.