Which iconic pop singer had a residency in Las Vegas titled "Piece of Me"?

Britney Spears

Which titan was punished by Zeus to hold up the heavens on his shoulders? In Clue, how many solution cards are hidden inside the envelope at the start of the game? Who sang the song "Call Me" from the film "American Gigolo"? What infamous pirate was known as 'Blackbeard'? Who first mapped planetary orbits mathematically in the early 17th century?