"I was so excited to see his show in London. We were going to be on tour in Europe at the same time and I was going to fly in to see him," Usmagazine.com quoted Spears as saying. "He has been an inspiration throughout my entire life and I''m devastated he's gone," she added.
Timberlake also posted a tribute to Jackson on his official website. "I can't find the words right now to express how deeply saddened I am by Michael"s passing. We have lost a genius and a true ambassador of not only Pop music but of all music," he wrote on his Web site.
"He has been an inspiration to multiple generations and I will always cherish the moments I shared with him on stage and all of the things I learned about music from him and the time we spent together. My heart goes out to his family and loved ones," he added.
Madonna is struggling to cope with the death of King of Pop Michael Jackson. "I can't stop crying over the sad news," People quoted Madonna, as saying. "I have always admired Michael Jackson. The world has lost one of the greats, but his music will live on forever! My heart goes out to his three children and other members of his family. God bless," she added.
Lisa Marie Presley, Jackson's ex-wife, said: "I am so very sad and confused with every emotion possible. I am heartbroken for his children, who I know were everything to him, and for his family. This is such a massive loss on so many levels, words fail me."
"My heart is overcome with sadness for the devastating loss of my true friend Michael," adds Brooke Shields, who raised eyebrows when she briefly dated Jackson. "He was an extraordinary friend, artist and contributor to the world. I join his family and his fans in celebrating his incredible life and mourning his untimely passing," she added.
The legendary singer passed away at the age of 50 yesterday after suffering an apparent heart attack.
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