"U Know It Ain't Love" is the debut single by R.J., featuring vocals from American rapper Pitbull. The song was written by Giovanbattista Giorgilli, Armando Christian Perez, Stephen Singer, Steve Obas, Shauna Gaye, Melissa McKenzie and produced by David May, Michel Schuhmacher, Marc "Marquito" Zibung. It was released in Belgium and Kontor, Ultra Records, JVC Japan, as a digital download on 28 November 2011.
