The latest Broadway production to make its way to Las Vegas comes courtesy of Monty Python. The knee-slappingly funny “Spamalot,” showing at the Wynn Las Vegas, made its official debut last weekend. The stars came out in all their splendor to take in the laughs at the Grail Theater. Guests such as Geena Davis, Robin Williams and Siegfried and Roy made cameos on the red carpet. It was a night of humor and high fashion as duds were top of the line for this premiere.