Last night's Grammy performance of epic 2008 mega-super-hit "Swagger Like Us," featuring M.I.A., Jay-Z, Kanye West, Lil' Wayne, and T.I. -- what more or less amounts to hip-hop's version of the Traveling Wilburys -- was awesome. The song, which prominently features M.I.A.'s line from "Paper Planes" -- "no one on the corner got swagger like us" -- has been remixed, covered, freestyled over, and remixed again by practically everyone in hip-hop. It's really that good. But last night's performance, which put the entire Staples Center on its feet, reminded me what the song's most ingenious line is: Jay-Z's opening salvo, in which he declares that "no one on the corner/got a bop like this/don't wear skinny jeans/'cause my knots won't fit." Is the ubiquitous rapper telling the truth with a legitimate grievance against tight jeans? Or has Jay-Z made it his business to personally end the trend himself for strictly sartorial motivations?