Tragic Pictures Inside Hotel Bathroom Where Whitney Houston's Body Found

Celebrities, from singers and rappers to television personalities and business leaders, took to Twitter to express their sadness at the news.

Stars praised the singer's unmatched talent and passed on their wishes to her bereaved family, while others expressed their shock at how the award-winning singer passed away at the age of just 48.

'Heartbroken and in tears over the shocking death of my friend, the incomparable Ms. Whitney Houston,' said Mariah Carey, who recorded the Oscar-winning song When You Believe with the late star in 1998.

'Shocked we've lost the immensely talented Whitney Houston!' wrote fellow singer Gloria Estefan.

Rihanna tweeted: 'No words! Just tears. I honestly can't think of anything else!!! Feels so strange being at the Grammy rehearsal right now!!'

Bee Gees singer Robin Gibb added his condolences, saying: 'In my estimation we have lost one of the greatest voices in popular music today...but as we always learn too late....we never cherish it until it's gone. My thoughts are with her family.'

A 'devastated' Mitch Winehouse, the father of late Amy Winehouse who died last year after a public battle with class A drugs, paid tribute on Twitter, writing: 'Amy, Etta, Whitney. Their music will NEVER die. What a great girl group in heaven. Mitch'.

Former Boyzone star Ronan Keating said the severity of the singer's problems had become apparent two years ago at the start of her comeback.

He told Sky: 'I'm devastated. I cannot believe it. It's hard to believe she's gone. Another legend, we've lost another singer, probably the greatest singer the world has ever seen.

'It's very sad to see the tough times in her life. I saw her two years ago when she was trying to make her comeback and I could see that she was weathered and you could see that she had been through tough time but you could see the voice was still there and she was trying.'