Amy Winehouse's ex-boyfriend and former assistant Alex Haines has dished the dirt on the singer's abusive past, branding her a druggy bulimic.

Alex - who reportedly whiled the hours away with Amy when husband Blake Fielder-Civil was in jail - has spilled the beans on their sordid affair.

Alex told The News of The World, “When Amy woke up the first thing she’d ask was, ‘Where’s my pipe?’.

"She often made crack pipes by putting foil on top of plastic bottles and then burning the drug.

“While she got it going I made toast with butter and a cup of tea for her. It was her normal breakfast."

Alex revealed that in her darkest moments Amy was spending £3,500 a week to feed her addiction.

He also described how the Rehab star would often cut herself, throw up McDonalds and engage in lurid sex romps to take her mind off Blake.

He said, “It was like having my own little porn star. Amy was so dirty—she wanted sex all the time. We did it four or five times a day and she’d even wake me up for it.

"She was addicted to sex like she was to drugs.”

See Amy's craziest nights out below