British singer Amy Winehouse is "obsessed" with jailed husband Blake Fielder-Civil and has hit back at reports she cheated on him.

The troubled star strongly denies claims she had an affair with her manager's assistant, Alex Haynes, earlier this year (08).

And she refuses to accept rumours Fielder-Civil wrote a series of explicit letters to a female prisoner while behind bars.

The Rehab hitmaker tells Britain's OK! magazine, "Does that mean we both see other people? No way. We are absolutely obsessed with each other.

"We both pinch ourselves daily. It's unbelievable that the person that you're obsessed with is the person who loves you most in the world.