Amy Winehouse cancels rest of comeback tour

Troubled British singer Amy Winehouse has pulled out of all the concerts on the rest of her comeback tour following a disastrous performance in Serbia, her spokesman said Tuesday.

Winehouse, who has battled drug addiction and has received treatment for a drinking problem, mumbled her way through Saturday's set at Belgrade's Fortress festival before she was booed off stage.

The 27-year-old "Back to Black" singer initially pulled out of festival shows in Istanbul and Athens but now her management has cancelled all her remaining gigs.

Her spokesman said: "Amy Winehouse is withdrawing from all scheduled performances.

"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."

In the run-up to her live return, Winehouse spent a week at an addiction treatment clinic in London, reportedly at the suggestion of her father, Mitch, over concerns that she was drinking too much before her shows.

She had also been due to appear at Spain's BBK Live festival in Bilbao, Switzerland's Piazza Grande in Locarno, Italy's Lucca festival, Switzerland's Paleo Festival in Nyon, Nova Jazz and Blues Night in Wiesen, Austria, and Poland's Bydgoszcz Artpop Festival over the coming weeks.

Disgruntled fans at the concert in Belgrade described the singer's performance as a "scandal" and a "disaster".

Winehouse left the stage twice during the 90-minute set, with many fans showing their displeasure despite her band's attempts to calm the crowd.