Amy Winehouse's official website targeted by hackers

Amy Winehouse's official website has been hacked.

A group calling themselves SwagSec have sabotaged the singer's page AmyWinehouse.com, turning the homepage into a flashing screen complete with expletives and a slogan reading: "Swagger Security - Winehouse = No Swag."

They have posted a rant about stealing "back the internet from the white devil" and talk about other stars such as Justin Bieber and Lady GaGa.

Winehouse was recently slammed for appearing on stage in Belgrade apparently drunk. She stumbled, hugged one of her guitarists and then slurred through various songs. The crowd booed throughout until the star left the stage.

She later cancelled her entire European tour, with her spokesperson saying: "Everyone involved wishes to do everything they can to help her return to her best and she will be given as long as it takes for this to happen."

Boy George has said that watching Winehouse's criticised performance in Belgrade was "truly absolutely heart-breaking stuff", adding: "I don't know why people put it on YouTube. I would just go home and cry."

Watch Amy Winehouse perform 'Back To Black' in Belgrade below: