London, Jan 21 - Singer Mariah Carey is so obsessed with wearing heels that her casual slippers have height too.

'I wear high heels all the time. Even my slippers. I can't even walk in flats,' Carey said.

Femalefirst.co.uk reports that her love for heels proved to be problematic while filming her new movie 'Precious', in which she plays Miss Weiss - a world-weary welfare officer who reveals the tragic life story of a teenager abused by both her parents.

'Mariah was born as an embryo in stiletto heels. She walks - even in her home - on her f***ing toenails,' said director Lee Daniels.