Justin Bieber has no business winning Grammys -- at least according to a guy who cleaned up at the award show last night ... Patrick Carney from The Black Keys.

Patrick was swarmed by fans outside Chateau Marmont when we asked if Bieber should feel snubbed -- seeing as how he didn't get a single Grammy nomination this year -- and he simply said, "He's rich, right?"

Then the Keys' drummer threw a major jab, adding ... "Grammys are for like music, not for money ... and he's making a lot of money. He should be happy."

Y se lio parda...

https://twitter.com/patrickcarney/status/301391016068517888

https://twitter.com/patrickcarney/status/301392400457289728

https://twitter.com/patrickcarney/statuses/301496878476959744

https://twitter.com/patrickcarney/statuses/301497586915868672

https://twitter.com/patrickcarney/statuses/301465991060271105

https://twitter.com/patrickcarney/statuses/301424350073081856

https://twitter.com/patrickcarney/statuses/301544765361623041

https://twitter.com/patrickcarney/status/301415390783864832

Podéis leer toda la colección en https://twitter.com/patrickcarney