Hot Song: 'Both of Us' star power

There's enough star power on "Both of Us" (Rebel Rock/Grand Hustle) to launch a dozen careers -- performed by B.O.B., featuring Taylor Swift, co-written by Dr. Luke. So why is it so bland? "Both of Us" has an acoustic folk start, faux-dubstep verses and, of course, plenty of rap. Despite that seemingly focus-grouped fusion, though, it falls short of the similar but far better "Airplanes," especially as Bobby Ray goes on about being an underdog. Dude, it doesn't get more establishment than this.