Admit it: Kings of Leon have gotten stuck in your craw for at least 30 seconds in their ascent to American rock deities or demons, depending on what side of the love/hate spectrum your tastes reside. "Use Somebody" is one of the biggest earworms of the past decade. "Sex On Fire" is a dive bar jukebox mainstay at this point. It's been a minute since KoL have changed the strings on their electric guitars and hit the road to preach the gospel of New Nashville (or their version of it), but with Mechanical Bull, their first record in three years and one that debuted at #1 in the UK and #2 in the US, you'd think the brooding, belting band of brothers (and cousin) would be ready to saddle up and buck up for an explosive volley of performances, SNL and otherwise, before they embark on a massive international tour in early 2014. You'd think they'd narrow their eyes and grit their teeth and inject the kind of intensity that made them famous, that made Caleb's screaming and straightforward tenor so endearing and addictive, into every single move they make as they get the music of Mechanical Bull out there. You'd think they'd show up to a late night television performance and prove to the world that they've still got the spark that "Use Somebody" fanned into an inferno.