That is the song, Thrift Shop by Macklemore, aka Ben Haggerty. "I'm gonna pop some tags, only got twenty dollars in my pocket."
The Thrift Shop music video has been viewed more than 117,000,000 times, sold more than two million copies and has reached #1 on the Billboard Hot 100 chart.
Macklemore is an independent rapper who has released three EPs, two albums and a mixtape, along with his producer, Ryan Lewis. His debut album, The Heist was released in October 2012. He is scheduled to headline at the Paid Dues hiphop festival in San Bernardino, CA in March 2013.