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Kanye West And Brad Pitt #kanyewest #bradpitt

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Brad Pitt and Kanye West -- when worlds collide! Who woulda thought Brad Pitt would show up at Kanye's Sunday Service?! We were expecting Justin Bieber!

Brad turned up at Ye's surprise Sunday Service session in Watts yesterday, during Labor Day weekend, to worship with the people in the streets.

Fans took pix and TMZ reports it's actually the SECOND time Pitt has attended service.

Kim Kardashian posted video of the Sunday Service Watts pop-up and it appeared to be a rousing event ... Ye led the crowd and his choir in a religious version of Tupac's "California." Watch! ...