StreetDance 3D (out May 20) is about a street dancing crew forced to team up with some ballet dancers for a big competition.  They come up with a completely original routine.  Sadly, the screenwriters haven't come up with an original script.  It uses every cliche in the book and the dialogue is dreadful.  The final dance number was good but that's the only positive I can think of.  Grade: C.