The Insider.com

Tom Hanks: "Steve Jobs changed this world. sent from my iPhone. Hanx"
Paris Hilton: "So sad to hear about Steve Jobs. He was a genius and one of the most innovative people on earth. He changed the world in so many ways. RIP"
Ellen DeGeneres: "I just finished my show and I heard the news about Steve Jobs. He was an amazing man with an incredible vision. He changed the world."
Dr. Drew: "Steve Jobs made a difference in my life & the life of my family. RIP Our tribute from earlier tonight - ow.ly/6OSKc"
Tom Arnold: "RIP Steve Jobs. So inspiring. I'm not competitive but he was 56 so I've still got 4 whole years to change the world."
Mandy Moore: "RIP Steve Jobs. Thank you for your innovation and genius. My heart goes out to his family and loved ones...."
Taye Diggs: "Such sad news about Steve Jobs. True visionary and inspiration. He will be missed."
Imogen Heap: "#stevejobs. Early songs on a Mac Classic II to now through the night on my G5. Your beautiful life's work is everywhere. (iPhone tweeted)"
Jane Fonda: "Had the good fortune to sit next to Steve Jobs at a dinner. Aside from genius he was a transformative visionary. It's a sad day."
Bill Gates: "For those of us lucky enough to get to work with Steve, it's been an insanely great honor. I will miss Steve." 
READ MORE CELEBRITY TRIBUTES TO STEVE JOBS HERE.