Ben Haggerty, known by his stage name Macklemore and formerly Professor Macklemore, is an American rapper and musician. He began independently releasing music in 2000 and now collaborates with producer Ryan Lewis, violinist Andrew Joslyn, and trumpeter Owuor Arunga. He has gained a significant online fanbase. He has released one mixtape, three EPs and two albums, although none on a major record label. His music video "Thrift Shop" has been viewed on YouTube over 300 million times, and reached number 1 on the U.S. Billboard Hot 100 chart, selling more than 2.2 million copies. His second single, "Can't Hold Us" also peaked at #1 of the Hot 100 Chart, making Macklemore & Ryan Lewis the first duo in the chart's history to have their first two singles both become a #1 single, and the first to do so without being signed to a major record company in almost 20 years.