First watch and follow along with Sandrina from the tutorial. You may have noticed that they are dancing On1 during the demo at the beginning of the video. This demo gives you a good idea of how to incorporate body rolls into the dance regardless of whether or not your dancing on1 or on2.
A body roll is a move that you will find in many styles of dance. Hip Hop, Belly Dance, Bachata, Salsa, and Cha Cha Cha all incorporate body rolls into the dance. Body rolls definitely look sexy and wow any onlookers so don't be shy about it!