BERLIN, GERMANY - APRIL 27: Opera singers perform in the pool 'AquAria PALAOA' during a rehearsal at the swimming pool Neukoelln on April 27, 2011 in Berlin, Germany. The premiere of the underwater ... more 
BERLIN, GERMANY - APRIL 27: Opera singers perform in the pool 'AquAria PALAOA' during a rehearsal at the swimming pool Neukoelln on April 27, 2011 in Berlin, Germany. The premiere of the underwater opera AquAria PALAOA is on May 1st. (Photo by Andreas Rentz/Getty Images) less 
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Getty Images | Photo By Andreas Rentz / Getty Images
Wed, Apr 27, 2011 6:58 PM EDT