Unofficial Grammy theme: Settling old scores

In today's New York Times, Jon Caramanica writes that Sunday night's Grammy telecast "was one of the dullest in recent memory" and I can't help but agree. As my colleague Chris Morris, who covered the ceremony for Variety wrote on Facebook, "the Grammys are about ratings and commercial muscle." True that, which makes for awfully predictable music. 

But that said, I thought the unstated theme for this particular telecast was settling old scores: Katy Perry customized her jab at soon-to-be ex Russell Brand with new lyrics for "Part of Me"; Taylor Swift targeted the haters who criticized her past Grammy performances with "You're So Mean"; Rihanna asserted her independence with "We Found Love" ("in a hopeless place"); Grammy queen Adele cleaned up with what she described as "a breakup album," "21"; and, finally, this Tweet from Chris Brown: "HATE ALL U WANT BECUZ I GOT A GRAMMY."

Talk about high school...