Red Ribbon Celebration Concert [Getty Images]

VIENNA, AUSTRIA - MAY 15: Anna Netrebko and Yusif Eyvazov attend the after show party after the Red Ribbon Celebration Concert - United in Difference at Burgtheater on May 15, 2015 in Vienna, Austria. (Photo by Thomas Niedermueller/Life Ball 2015/Getty Images)

Getty Images Entertainment Thomas Niedermueller/Life Ball 2015