I first heard this song on our way to King's Island this past Saturday, but I haven't heard it since.  It took me by surprise because I had heard nothing of its existence beforehand, but it is such a great collaboration.  The Gym Class Heroes have been absent from the music scene for the past few years as lead singer Travie McCoy focused on his (abysmal and laughable) solo career.  Their last big hit was 'Cookie Jar', but now they're back teaming up with Maroon 5 frontman Adam Levine.  This is just one of those feel good songs that you can bop your head along to.  Adam's suave vocals overlay the hip-hop beat nicely and act as a great compliment to Travie's rapping.  Great summer smash for sure.