Missy Elliott. We Run This.
Featured on the We Run This Workout Playlist.

You know the feeling you get when you're tired from running and you're about to stop, but then a song comes on that just fuels you and you get an extra burst of energy? This song does it to me everytime, so I like to put it in the middle of my running playlist, when I might need a second wind. Buy it on iTunes or Amazon.com