By Nadia Mendoza

Icon: Whitney Houston, seen here with Simon Cowell, Dannii Minogue and Cheryl Cole, sang on X Factor in 2009

Simon Cowell today paid tribute to Whitney Houston and said the warning signs that she 'still had problems' came after the singer made an erratic appearance on The X Factor in 2009.

Despite battling her personal demons, the Syco boss, 52, did reveal she was to be considered for a mentor role on the US version of the reality show - with discussion meetings to commence tomorrow.

He also alluded to iconic stars Michael Jackson and Amy Winehouse,

By Daily Mail Reporter

From the middle of the Eighties to the late Nineties she was one of the world's best-selling artists, wowing audiences with her powerful and effortless voice.

The showbiz world was rocked today with the tragic news that one of music's biggest legends Whitney Houston is dead.

We look back at the life and times of the Grammy and Emmy-Award winning artist whose life was tragically cut short at the age of 48.

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Tragic: Music legend Whitney Houston died today at the age 48-years-old

Whitney Elizabeth Houston was born to a middle class family in

By Mark Duell

Child: Houston, pictured in 1965, was the daughter of gospel singer Cissy Houston, the cousin of 1960s pop diva Dionne Warwick and the goddaughter of Aretha Franklin

Whitney Houston, who ruled as pop music's queen until her majestic voice and regal image were ravaged by drug use, erratic behavior and a tumultuous marriage to singer Bobby Brown, died on Saturday. She was aged 48. MailOnline looks back at the life of the star singer who was pronounced dead in her room of the Beverly Hilton in Los Angeles, California


Young star: Whitney

By Daily Mail Reporter

Flashing the flesh: Kim Kardashian, Amber Rose and Britney Spears arrived on the red carpet in very revealing outfits at the Clive Davis and the Recording Academy's 2012 Pre-GRAMMY Gala at the Beverly Hilton Hotel, where Whitney Houston was found dead just hours earlier

In Hollywood, they say the show must go on.

And tonight not even the death of one of the music industry's biggest names was enough to halt a pre-Grammy's party in Hollywood.

Clive Davis decided to press ahead with his annual soiree at the Beverly Hilton Hotel despite the fact