"Be Without You" is a song by American recording artist Mary J. Blige. It was written by Johnta Austin, Bryan Michael Cox, Jason Perry and Blige for her seventh studio album, The Breakthrough. Produced by Cox and Ron Fair, it was released as the album's first official single on September 15, 2005.
Ranking among the most played songs on US radio in the year 2006, the single was certified double-platinum by the RIAA in 2007. In March 2017, Billboard Magazine ranked "Be Without You" as the most successful R&B/Hip-Hop Song of all time. .