Keep Out! Orlando Bloom

Kanye West, Justin Bieber and Kim Kardashian partied their faces off Friday night in Ibiza ... while Orlando Bloom reportedly was shut out on all the fun.

It was bash for Givenchy fashion designer Riccardo Tisci ... also attended by Diddy, Jared Leto and Kate Moss.

Kanye even performed some of his songs -- including "Black Skinhead"

Bloom arrived once Bieber was already inside -- and according to Page Six J.B.'s people put the screws on organizers to keep Orlando out.  The actor never got inside.