The Other Side of the Door is basically Her songwriting cliches and narratives from The Mixtape and Fearless eras wrapped into one. The outro bridge reminds me so much of ATW's outro..
So dim that spotlight, tell me things like
I can't take my eyes off of you
I'm no one special, just another wide-eyed girl
Who's desperately in love with you Give me a photograph to hang on my wall
Superstar
... but where?
Miranda Cosgrove introduced her to the Ain't Nothing Bout You performance, so it kinda makes sense