In this case all 3 of the youtube stars are make up artists however if we was to create content that brought youtubers from different ends of the spectrum together and created challenges this could work. The idea of bringing 2 completely different worlds together. i.e. makeup and gaming!
There was a time where Joey Graceffa had some of the most popular faces on the net all contribute to the video that was to promote his book & its release. The video is a mashup of all the youtubers reading out the back story and it . was viewed over a million times… The point is .. collaboration is a good thing in the youtube world and getting a few people on board for challenges would be LIT.