Beyonce closed out her Formation World Tour Friday night with a couple big guests ... Serena Williams and hubby Jay Z.
Queen Bey was at MetLife Stadium in New Jersey for her swan song. Serena did a cameo for "Lemonade" ... rising from the stage to reprise that thing she did for the "Sorry" music vid.
As for Jay ... he came out for "Drunk in Love" ... and he grabbed a little ass.
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