Which musician became the Armenian ambassador to Switzerland in 2009?

Charles Aznavour (22 May 1924) is a French, later naturalised Armenian, singer, songwriter, actor, public activist and diplomat. Aznavour is known for his unique tenor voice: clear and ringing in its upper reaches, with gravelly and profound low notes. In a career spanning over 80 years, he has written more than 800 songs. On disc, he recorded more than 1,200 songs, sung in eight languages. He is one of France's most popular and enduring singers. He has sold 200 million records and has been dubbed France's Frank Sinatra, while music critic Stephen Holden has described Aznavour as "French pop deity."

He is also arguably the most famous Armenian of his time. In 1998, Aznavour was named Entertainer of the Century by CNN and users of Time Online from around the globe. He was recognized as the century's outstanding performer, with nearly 18% of the total vote, edging out Elvis Presley and Bob Dylan.

He has sung for presidents, popes and royalty, as well as at humanitarian events. In response to the 1988 Armenian earthquake, he founded the charitable organization Aznavour for Armenia along with his long-time friend impresario Levon Sayan. In 2009, he was appointed ambassador of Armenia to Switzerland, as well as Armenia's permanent delegate to the United Nations at Geneva. He started his most recent tour in 2014.

On 24 August 2017, Charles Aznavour was awarded the 2,618th star on the Hollywood Walk of Fame.