Clearly, you do not understand what original research is 

I will combine this section later. 

But, no, it's not original research, IP, to state that the public was interested in celebrity supercouples after Bennifer. Why isn't it original research? Because it's a damn fact, as evidenced in that section. No citation is needed for a well-shown or known fact, especially not one that is backed up by references showing that the public is significantly interested in these couples as well. These couples came after Bennifer. There's the damn fact right there. Any great Wikipedian editor would tell you the same thing. What you're asking for is like asking for a citation that water exists. 

Hell, there's even a citation in that section that describes Brangelina as bigger than Bennifer. The facts are all in that section. Damn. It's that damn simple.