The cello (pron.: /ˈtʃɛloʊ/CHEL-oh; plural cellos or celli) is a bowedstring instrument with four strings tuned in perfect fifths. It is a member of the violin family of musical instruments, which also includes the violin and viola.
Yo-Yo Ma (born October 7, 1955) is an Americancellist. He has received multiple Grammy Awards, the National Medal of Arts in 2001 and the Presidential Medal of Freedom in 2011. Ma is one of the best-known cellists of the modern age, and is widely considered one of its most talented.