Stevland Hardaway Morris (born May 13, 1950, as Stevland Hardaway Judkins), known by his stage name Stevie Wonder, is an American musician, singer, songwriter, record producer, and multi-instrumentalist. A child prodigy, he became one of the most creative and loved musical performers of the late 20th century. Wonder signed with Motown's Tamla label at the age of 11 and has continued to perform and record for Motown as of the early 2010s. He has been blind since shortly after birth. Among Wonder's works are singles such as "Superstition", "Sir Duke", "You Are the Sunshine of My Life" and "I Just Called to Say I Love You"; and albums such as Talking Book, Innervisions and Songs in the Key of Life. He has recorded more than 30 U.S. top ten hits and received 25 Grammy Awards, the most ever awarded to a male solo artist, and has sold over 100 million albums and singles, making him one of the top 60 best-selling music artists. 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 2013, Billboard magazine released a list of the Billboard Hot 100 All-Time Top Artists to celebrate the US singles chart's 55th anniversary, with Wonder at number six.