The 27-year-old was recently found dead at her home in London and it's claimed she was caught by Traviss calling up her ex, Blake Fielder-Civil in prison.
A friend of the star told UK newspaper the Daily Mirror: 'She went on self-destruct.'
It's claimed the Rehab singer had a massive row with her boyfriend when he found out she had been phoning her ex in prison.
The source added: 'Reg found out Amy and Blake had been chatting and got upset. The pair had a fight and Reg walked out.
'She had been drinking more and more whisky - before her disastrous Serbian gig she had shared nine bottles of Jack Daniels - and then basically decided to play Russian roulette with her life.'