Rihanna's Cleopatra strip at concert

Rihanna performs at the Robin Hood Foundation Benefit at the Jacob K Javits Convention Center in New York May 14, 2012. (REUTERS)

Rihanna performs at the Robin Hood Foundation Benefit at the Jacob K Javits Convention Center in New York May 14, 2012. (REUTERS)

Rihanna performs at the Robin Hood Foundation Benefit at the Jacob K Javits Convention Center in New York May 14, 2012. (REUTERS)

Rihanna performs at the Robin Hood Foundation Benefit at the Jacob K Javits Convention Center in New York May 14, 2012. (REUTERS)

Rihanna performs at the Robin Hood Foundation Benefit at the Jacob K Javits Convention Center in New York May 14, 2012. (REUTERS)

Rihanna performs at the Robin Hood Foundation Benefit at the Jacob K Javits Convention Center in New York May 14, 2012. (REUTERS)