Amy Winehouse has canceled her entire European tour after reportedly falling off the wagon. The 27-year-old singer was booed by the crowd during a recent show in Belgrade after appearing on stage under the influence.

After arriving on stage over an hour late, the singer shouted to the 20,000 fans in attendance, "Hello, Athens."

Winehouse's rep released the following statement:

    "Despite feeling sure that she wanted to fulfill these commitments, she has agreed with management that she cannot perform to the best of her ability and will return home. She would like to apologize to fans expecting to see her at the shows but feels that this is the right thing to do."


Following her brief performance in Belgrade, the Serbian defense minister Dragan Sutanovac called her appearance "a shame."

Find out where Winehouse is still scheduled to perform ... after the jump.