Jennifer Flavin-Stallone surprised Sly with an early birthday bash at the soon to open Planet Hollywood Resort and Casino in Las Vegas. In addition to Bruce Willis, Arnold Schwarzenegger and John Travolta, others in attendance included James Caan, David Spade, Tom Jones [who sang] and many others. Although Sly's birthday isn't until next month, Jennifer wanted to surprise Sly! The celebration was covered on Entertainment Tonight and Access Hollywood. You can read more about it here, here, here, here and just about anywhere you turn on the net.