The singer leaked her version of Britney Spears's 'Womanizer' to Ronson, after which it was ripped by fans and put online.
"It wasn't my intention for it to have whizzed round the world like it has. Mark Ronson asked me for something no one had heard to play on his radio show, and 'Womanizer' was the only song I had as an attachment on my Blackberry, and I couldn't get home to send him anything else in time," Allen wrote in her blog.
"I had asked him to talk all over it so it wouldn't get ripped, but he didn't. Thanks Mark, for getting me in serious trouble with my record company."