Bree Sharp's cover of 'Boys of Summer' is a pretty big improvement over the original, given that she can actually, y'know, sing in that range, so her performance doesn't give the impression that vocal cords are going to snap any freakin' second. It also has a sweeter, more introspective sound.

Smartbomb's cover of 'Breathe' radically transforms the tune from a Revlon-country sapfest to a high-intensity, almost stalkerish urgency. It's a lot more fun than the Faith Hill version.