The top ten best selling singles of 2013. What are they and who are they by? Easy?

How about backwards??!!

It’s ugly and it’s painful but it’s fun

(Both the forward and backward tracks are included so you could deliver a top ten hits of 2014 the right way round)

includes clips from Robin Thicke, Daft Punk feat Pharrell Williams, Avicii, Passenger, Naughty Boy ft Sam Smith, Katy Perry, Macklemore/Ryan Lewis, Pink ft Nate Ruess, OneRepublic, Justin Timberlake