Romeo Santos bests himself at his own game on "Formula, Vol. 2." The album follows in the footsteps of "Vol. 1," clinging to his bachata roots, despite the cross-genre collaborators. Where "Vol. 1" had the likes of Usher, "Vol. 2" features Drake on "Odio" (Hate), as well as Nicki Minaj and Carlos Santana, all performing bachata. That it all works is testament to Santos' ability to blend traditional and cutting edge so smoothly.