The Rehab singer, 27, was discovered at the property in north London by emergency services at around 3.54pm this afternoon, according to sources.
A police statement said: "Police were called by London Ambulance Service to an address in Camden Square NW1 shortly before 16.05hrs today, Saturday 23 July, following reports of a woman found deceased.
"On arrival officers found the body of a 27-year-old female who was pronounced dead at the scene.
Family ... with dad Mitch
Xposur
"Enquiries continue into the circumstances of the death. At this early stage it is being treated as unexplained."
Amy had recently cancelled all tour dates and engagements after a series of erratic public appearances.
But she appeared with her goddaughter Dionne Bromfield earlier this week at the iTunes festival where she urged the crowd to buy the young singer's album.
Loving ... Amy with goddaughter Dionne Blomfield
Optic/Rex
Amy had battled drink and drugs problems throughout her career.
She also had troubled relationships with Pete Doherty and Blake Fielder-Civil.
AMY WINHOUSE DEAD, RIP!
interview new found overdose Amy Winehouse drugs sad footage overdose glass glory lost exclusive interviews haven window connecticut "interview part" post rare dada you outside backstage finally still meet philip live good place "you found" hometown someone fray paradise been shattered lookin "found glory" sad him
So sad, you was a tortured soul. );
genabet123 6 months ago
she really looked good here..... so sad!
Sharlzie 6 months ago
She, she acualy looks healthy! And sorry but this mite be keshas death....
Alex110080 7 months ago
She was so beautiful & healthy :( Stupid drugs & stuff i wish they never existed!
Sebizzar 7 months ago