In the entertainment industry, most of you would agree that two main dancers exist. Chris Brown and Usher. Am not saying that the likes of omarion, les twins do not know how to dance or are inferior but are not as popular as the former two mentioned. Take for example, when i started watching music videos where the musicians danced, the only people i saw were Usher and Chrisbrown. Neyo was also part of them but he wasn't just as popular to me.
So firstly, Chrisbrown:
Christopher Maurice Brown is an american hip-hop artiste which has broken new grounds with his dancing. To me, Chrisbrown is the type of dancer that knows how to deliver in choreography (dancing with people or in a group) as is seen in most of his music videos where he makes smooth moves as the main dancer in a group. For example, liquor by chrisbrown.

Unlike Cbreezy (Chrisbrown), Usher tends to dance alone and does what i refer to as the one dance kill. He doesn't dance much but then does a single move that makes you want to cut out that part of the video and watch it over and over again. I have fallen victim to this and have even tried occasionally to copy his moves but things don't usually end well.
I don't know which to pick as my favourite but I leave you with this video to use and judge.