A standard piano has 88 keys: 52 white and 36 black. But who decided this number would be the norm, and why? The king of instruments has played a significant role in music history. From concertos and ...

In the video, the 51-year-old star, known for his roles in "27 Dresses" (2008) and "The Notebook" (2004), joined a friend onstage for a duet of Billy Joel's 1973 hit "Piano Man." Marsden got down ...