Mr. Know It All

Sony After a year of delays and a handful of Internet leaks, Kelly Clarkson is finally getting ready to release her next album, ‘Stronger’ — and she kicked things off Tuesday, when she debuted the set’s first single, ‘Mr. Know It All.’ The song was unveiled via a live premiere at Kelly’s official site, but if you missed it, don’t worry: she’s thoughtfully kept it up for your listening pleasure — a