Speaking to Absolute Radio on last night's BAFTA Film Awards red carpet, George Clooney, Tom Jones, Daniel Radcliffe, Kenneth Branagh and Viola Davis joined those who had already reacted to the star's passing at the weekend.
Clooney said: "She'll be remembered as one of the greats who changed music and certainly changed the kind of singing that took place, starting in the mid-80s... What it really is is unbelievably sad."
Jones added: "Whitney was a great singer - she was my favourite female singer. The best voice, the most natural, sexy-sounding person that I've ever heard.
"It's a shame that talent like that has to be cut short."
Jennifer Hudson performed 'I Will Always Love You' in Houston's memory at last night's Grammy Awards, while rapper LL Cool J acknowledged "a death in our family".
Music manager Sharon Osbourne has said that Houston's death should inspire people to have more compassion for those addicted to drugs.
Complete coverage of Whitney Houston's death:
> Whitney Houston 1963-2012: Obituary
> Whitney Houston 1963-2012: 'I Will Always Love You' named best song
> Whitney Houston: Her best live performances
> Whitney Houston: A life in pictures
> Whitney Houston: Greatest musical achievements - pictures
> What is Whitney Houston's best song? Poll
> Whitney Houston posthumously tops iTunes, Amazon charts
> Whitney Houston to dominate singles, album charts next week
Move through our gallery of Whitney Houston's life in pictures below: