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Pharrell Williams' no. 1 hit single 'Happy' has been covered by a classical trombone student, becoming an online hit on YouTube.
The video, posted by Christopher Bill, a trombone student at the SUNY Purchase Conservatory of Music, takes the phenomenally popular Pharrell Williams original and turns it into a looped trombone version with added percussion.
Previously, Bill has achieved viral success with his trombone covers of Owl City, Taylor Swift and Coldplay.
This latest attempt appears to be the most successful so far, though, currently with over 400,000 views on YouTube.