If you took the top of the Billboard charts and scooped up just about every huge female star on it, you wouldn't even come close to the lineup for the "Just Stand Up" charity single in support of the Stand Up to Cancer charity. Among the names on the roster are: Mariah Carey, Beyoncé, Mary J. Blige, Rihanna, Fergie, Sheryl Crow, Miley Cyrus, Melissa Etheridge, Ashanti, Natasha Bedingfield, Keyshia Cole, Ciara, Leona Lewis, LeAnn Rimes and Carrie Underwood.

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By Sarah Muller

You might have seen him cracking jokes on "Oprah" or moving the masses on YouTube.

Randy Pausch, better known as the "Last Lecture" professor, died at home in Virginia Friday morning (July 25) from pancreatic cancer.

The former Carnegie Mellon University computer scientist became a viral Internet sensation after he gave an inspirational talk about facing terminal cancer.

As an advocate of living each day to the fullest, Pausch managed to fulfill nearly all of his childhood dreams: being in zero gravity, writing an article in the World Book Encyclopedia and working with the Walt Disney Company. He even managed to star as an extra in the new "Star Trek" movie. His "Last Lecture" was also turned into a bestselling book of the same name.

None too shabby, indeed. Pausch was 47.