LAS VEGAS - JULY 28:  Singer Rihanna performs at the Voodoo Lounge on top of the Rio Hotel & Casino at a party during the first day of the World Series of Poker's no-limit Texas Hold 'em main event July 28, 2006 in Las Vegas, Nevada. Over 8,500 players have so far signed up for the event. The final nine players will compete for the top prize of more than USD 11.5 million on the final table which begins August 10.  (Photo by Ethan Miller/Getty Images)