Whitney HoustonWhitney HoustonWhitney Houston is hooked on crack cocaine and living in squalor at the mansion she shares with Bobby Brown, according to reports.

The allegations were made by Bobby's sister, Tina, a former addict who claims she used to use crack with the star.

Tina told America's National Enquirer magazine: "The truth needs to come out. Whitney won't stay off the drugs. It's every single day. It's so ugly.

"Everyone is so scared she is going to overdose."

Pictures in The Sun, of what is claimed to be Whitney's bathroom, show a crack-smoking pipe and cocaine-caked spoon lined up alongside rubbish and beer cans.

Whitney, mother to 13-year-old Kristina, is thought to have blown much of her multimillion dollar fortune, from 100m record sales, on her habit.

Whitney Houston stunsWhitney: Better daysShe was rushed to hospital in 2003 with blood gushing from her nose.

Tina claims drugs have made Whitney so paranoid that she sees demons everywhere and once made a hole in the bathroom wall as a spy hole.

She added: "I understand what she's going through. Addiction is a disease.

"Maybe this interview will save her life."