Amy Winehouse has been found dead at her flat.

The multi Grammy-winning 27-year-old was discovered at the property in Camden, north London by emergency services at around 3.54pm on Saturday afternoon, according to sources.

It is understood her death is being treated as ‘unexplained’, although later reports suggested that she may have suffered a drug overdose.

The London Ambulance Service attended her flat, but according to Sky News sources said that the singer was “beyond help”.

A Metropolitan Police spokesman confirmed on Saturday night that despite the speculation the cause of Amy’s death had yet to be confirmed and said it was “inappropriate” to suggest what might have been responsible.

“The death of any person is a sad time of friends and family especially for someone known nationally and internationally like Amy Winehouse,” the spokesman added.

“My sympathy extends not only to her family but also to her millions of fans across the world.”

Amy’s father Mitch Winehouse was reportedly on his way home from New York, where he had been due to perform at the Blue Note jazz club in the city on Monday.

The singer’s record label Universal Island also released a statement following news of her death.

“We are deeply saddened at the sudden loss of such a gifted musician, artist and performer,” it said.

“Our prayers go out to Amy’s family, friends and fans at this difficult time.”

The Back To Black artist cancelled all tour dates and engagements last month after a series of erratic public appearances.

She had been troubled by drink and drugs problems throughout her career. The north Londoner pulled out of the European tour after she was jeered at the first gig in Serbia for appearing too drunk to perform in June.

American star Moby, who performed at the same concert, tweeted: “after our show in serbia i wish i’d been able to help amy. i’m sorry.”

Singer and actress Kelly Osbourne wrote, “i cant even breath right now im crying so hard i just lost 1 of my best friends. i love you forever Amy & will never forget the real you!”

Television presenter Piers Morgan said on the social networking website: “Such desperately sad news re Amy Winehouse. Supreme talent, terrible self-destructive addictive personality.”

Amy had won widespread acclaim, aged 20, with her 2003 debut album, Frank.

But it was 2006’s Back to Black which brought her worldwide stardom, winning five Grammy Awards.

Celebrities paid tribute to the star on Twitter. Radio DJ Fearne Cotton said: “Can not believe the news. Amy was a special girl. The saddest news.”

Presenter Phillip Schofield added: “Just heard the sad news that Amy Winehouse has died. At only 27 what a terrible waste of a great talent. Sincere condolences to her family.”

The troubled singer made her last public appearance on Wednesday night when she joined her goddaughter Dionne Bromfield on stage at The Roundhouse in Camden.

The singer danced with Bromfield and encouraged the audience to buy her album in the impromptu appearance before leaving the stage.