A guy by the name of Bruce D has been posting vines that mash up rap (occasionally pop) songs with children's' programming Disney movies, Barney, Teletubbies, the Wizard of Oz. They're matching up pretty well.
Move over, Ryan Gosling and Will Sasso, the Vine throne belongs to BRUCE D.
Kind of funny how a new format (Vine) can refresh an old idea (rap / kids mashup). For example, this Barney / Tupac mashup goes way back (2006).
Also see: The 10 Best Disney-Rap Mashups