Listen to Work Bitch (Instrumental Karaoke Remix Originally Performed by Britney Spears) online. Work Bitch (Instrumental Karaoke Remix Originally Performed by Britney Spears) is an English language song and is sung by Krazy K.. Work Bitch (Instrumental Karaoke Remix Originally Performed by Britney Spears), from the album Top 20 Karaoke Dance Pop Hits 2014, Vol. 1, was released in the year 2014. The duration of the song is 3:26. Download English songs online from JioSaavn.