Justin Bieber is a paranoid, self-absorbed megalomaniac ... is what you've gotta think after seeing the laughable rules he sets for photo shoots -- including a ban on speaking to the Bieber, and NEVER playing his ex ... Selena Gomez's music.
TMZ has obtained a rider from a Bieber photo shoot earlier this month, and other restrictions include NO cell phones and NO autographs whatsoever ... which are actually pretty common demands.
But Bieber also has a laundry list of food demands on set -- including herbal teas, a deli platter, a veggie platter, a large pack of Swedish Fish, Ritz Bits Peanut Butter Sandwiches, Ritz Bitz Cheese Sandwiches, and 2 large packs of Haribo cola gummies.
Bieber also must have a serious sweating problem -- because he asks for several packs of white undershirts, tanks and socks as well. Weird.
Then of course, there's the required boombox with an iPhone 5 connector ... for tunes.
Just remember: "No Selena Music on set."