UNICEF Executive Director Anthony Lake claps as singer Katy Perry is officially made a UNICEF Goodwill ambassador at UNICEF headquarters in New York, December 3, 2013. REUTERS/Lucas Jackson (UNITED ... more 
UNICEF Executive Director Anthony Lake claps as singer Katy Perry is officially made a UNICEF Goodwill ambassador at UNICEF headquarters in New York, December 3, 2013. REUTERS/Lucas Jackson (UNITED STATES - Tags: ENTERTAINMENT SOCIETY) less 
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Reuters | Photo By LUCAS JACKSON / REUTERS
Tue, Dec 3, 2013 4:13 PM EST