After a long-term battle with pancreatic cancer, Apple Inc. founder Steve Jobs has died at the age of 56. Jobs was a true visionary and one of the most influential and inspiring figures of the 20th and 21st centuries. Not only did Jobs create a unique breeds of technologies -- including the iPod, Macintosh computer, iPad, and iPhone -- but he also served as the CEO of Pixar Animation Studios, producing flicks like 'Toy Story,' and was a member on the board of directors at The Walt Disney Company. Today marks the loss of a true legend, and pop stars immediately began posting their condolences and messages of grief via Twitter. See what Kylie Minogue, Blink-182, Jordin Sparks plus more had to say about the death of Steve Jobs.