( CNN ) -- Toxicology tests have found that `` no illegal substances '' were in singer Amy Winehouse 's system at the time of her death last month , her family said Tuesday . `` Results indicate that alcohol was present but it can not be determined as yet if it played a role in her death , '' the family said in a written statement , citing test results provided to them by authorities . The 27-year-old singer , beloved for her talent but infamous for erratic public behavior , arrests and drug problems , was found dead at her apartment in London on July 23 . Winehouse 's soulful , throaty vocals brought the British musician stardom in 2007 , but her troubled off-stage life -- chronicled in her top 10 hit `` Rehab '' -- won her notoriety . Her death came less than two months after her latest release from a rehabilitation program and weeks after she was booed offstage by disappointed fans in Serbia . `` Rehab , '' in which she sang `` They tried to make me go to rehab , I said no , no , no , '' helped form the public 's view of Winehouse . But she told CNN in a 2007 interview , `` I do n't care enough about what people think of me to conform to anything . '' The London-born singer-songwriter became a picture of a tattooed teenage rebel after she was expelled from a prestigious performing arts school . Her first album , `` Frank , '' debuted in 2003 , when she was 19. International success came with her 2007 album `` Back to Black . '' She dominated the 2008 Grammys , winning five awards that night and delivering , via satellite from London , a strong performance of `` Rehab . '' Winehouse 's volatile marriage to Blake Fielder-Civil took a toll on the singer 's career . The couple divorced in 2009 after a stormy two years filled by drug addiction and arrests .
` ` ' was present '' but it 's not clear if it played a role in the singer 's death . She died last year at the age of 27 . She was as famous for her off - stage performances as she was for her soulful songs .