"No One" is an R&B, neo-soul and jazz song written and produced by American singer-songwriter Alicia Keys and American songwriter-producers Kerry Brothers, Jr. and George D. Harry for Keys' third studio album, As I Am (2007). Released as the album's lead single in September 2007, this is overall Keys' most successful song worldwide to date, topping the United World Chart for two weeks and becoming the twentieth best-selling single of 2007 with points of 3,556,000.