Listen to Doin' It (as made famous by LL Cool J) online. Doin' It (as made famous by LL Cool J) is an English language song and is sung by DJ Masters United. Doin' It (as made famous by LL Cool J), from the album Hip Hop Beats, was released in the year 2009. The duration of the song is 5:14. Download English songs online from JioSaavn.