Song of the Summer

With summer quickly approaching, I've been driving with my windows down more and more and with the radio turned up real high.  For this post I want to highlight the past 5 years songs of the summer and ask you - what song do you think will be the song of the summer for 2014?  Is it Iggy Azalea? Or maybe Calvin Harris?  Let me know down below in the comments!
2009:

2010:

2011:

2012:

2013:

Hopefully these bring back some good memories for you!  Regardless of the time of year, whenever one of these songs comes on I can't help but feel transported to the days of summer past.  So I must ask again - what is going to be the 2014 Song of the Summer?!