Justin Bieber fans have taken his loss at the Grammys to heart, ranting all over the Net over its unfairness and even posting messages on Twitter.

Bieber on his part is as disappointed at his loss. I had no clue what was going to happen; I worked really hard these past few years and you know, I'm not going to lie — I was disappointed, Bieber told MTV News backstage at the Staples Center, just minutes after he lost the award to Esperanza Spalding. But, you know, I'm gonna come back [next year] and we'll take a few home.

For Bieber, the loss was great as he and everyone concerned were very sure of his place. He even got a standing ovation for his performance with Usher and Jayden Smith in the opening act.

He had one last message for all his die-hard fans out there: Bieber fans, don't get too upset, he laughed. Be happy.

The fans have shown their unhappiness on Twitter world with death threats, abuse and dire warnings too.