Rihanna: World Cup Partying -- RiRi Rages With Germany After Victory

Rihanna was the German special guest of honor at the World Cup afterparty last night ... gettin' wild with the team and the golden trophy ... and of course, she documented the entire thing.

For some reason, RiRi -- -- born in Barbados, lives in NYC -- is a HUGE fan of Team Germany and was at the game when Gotze hit the winning shot.

Apparently, Germany loves Rihanna too ... because they didn't just invite her to party the team ... they brought her the cup for a celebratory photo sesh.

She even tweeted about it ... "I touched the cup, held the cup, kissed the cup, took a selfie wit the cup!!! I meeeaan...... what is YO bucket list looking like bruh?"