The Grammys — Stage Crasher ARRESTED After Run-In with Jennifer Lopez

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The moron who crashed the stage at The Grammys — only to get kicked off stage by Jennifer Lopez on live TV — was arrested for trespassing directly following the awards show … and it”s not the dumbest stunt he”s ever pulled.

The idiot who wound up in handcuffs is Vitalli Sediuk … the same dumbass who got slapped in the face by Will Smith last year (and rightfully so) when he tried to surprise the actor with a kiss on the lips on a red carpet.

During the Grammys, Sediuk somehow weaseled his way backstage … and when Adele was announced as the winner for Best Pop Solo Performance … Vitalli rushed to the podium and tried to grab the mic from presenter Jennifer Lopez.

Sediuk managed to get out a few words … saying, “Thank you, Adele. You’re my inspiration” … but Lopez quickly ripped the mic back and shooed him offstage.

Directly following the show, cops arrested Sediuk for trespassing — and he spent the night in a jail cell … this according to the Hollywood Reporter.

Sediuk told THR he”s just a prankster and meant no harm — adding, “I’m not a crazy guy. I just think differently.”