Stevland Hardaway Morris (previously Judkins; born May 13, 1950), known by his stage name Stevie Wonder, is an American singer-songwriter, multi-instrumentalist, record producer and activist. Blind since shortly after birth, Wonder signed with Motown Records' Tamla label at the age of eleven, and continues to perform and record for Motown to this day. Among Wonder's best known works are singles such as "Superstition", "Sir Duke", "I Wish" and "I Just Called to Say I Love You". Well known albums also include Talking Book, Innervisions and Songs in the Key of Life. He has recorded more than thirty U.S. top ten hits and received twenty-two Grammy Awards, the most ever awarded to a male solo artist. Wonder is also noted for his work as an activist for political causes, including his 1980 campaign to make Martin Luther King, Jr.'s birthday a holiday in the United States. In 2009, Wonder was named a United Nations Messenger of Peace. In 2008, Billboard magazine released a list of the Hot 100 All-Time Top Artists to celebrate the US singles chart's fiftieth anniversary, with Wonder at number five.