Stephen Colbert - A Blue-Wigged Stephen Colbert Hijacks the Stage at RNC

This is a reference to a Hunger Games joke he does on his show in case anyone is wondering.

Also I'm wondering if he was invited there by someone, which would honestly be funny because it'd show someone clearly didn't get Colbert's shtick on the Colbert Report (which has been over for a good while now) was satire. (remember this is the guy who got invited to a White House dinner during the Bush presidency and stayed in character while delivering jabs at said Bush presidency, and Bill O'Reilly came on his show apparently believing Colbert to be genuine)

I think it's much more likely that someone invited him knowing what would happen. The dinner appearance was a planned roasting W approved of. Also Bill came on his show in-character, even though he doesn't like Colbert, but still got it (compare his Colbert interactions to his Daily Show appearances, where he's more himself)