Whitney Houston is reportedly hooked on crack cocaine and living in squalor. The pop diva - whose stunning looks have apparently been ravaged by her habit - allegedly holes up at seedy crack dens for weeks at a time, indulging in her habit. The singer - who is married to pop star Bobby Brown, who she has a 13-year-old daughter with - also spends days locked in her bedroom amid piles of garbage, taking drugs and using sex toys.

Shocking photographs show the star's bathroom littered with drug paraphernalia, including a crack-smoking pipe and cocaine-covered spoons. The allegations were made by Bobby Brown's sister, Tina, who claims she used to use crack with the star.

Tina told 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."

She claims the drugs have made Whitney so paranoid she sees evil apparitions and once drilled a spy-hole in her bathroom to look for "demons". She said: "She'll point to the floor and say, 'See that demon. I'm telling you somebody's messing with Bobby'. She always thinks it's something to do with Bobby."

She added: "She breaks everything - mirrors, phones, cabinets, appliances." Whitney - who is said to have blown much of her multi-million dollar fortune on her drug habit - has reportedly refused all offers of help.