While the Radiohead/Lil Wayne/Kanye West Grammy mashup performance still only exists in the deepest reaches of my consciousness, there are other intriguing (and definitely more reality-based) whispers about Radiohead's first Grammy performance ever pinging around the net.The most believable one has the band playing In Rainbows opener "15 Step" with the help of USC's Marching Band (via At Ease). While there are no big-band flourishes on the LP version of "15 Step", its syncopated rhythm does seem ripe for the big-bass-drum 'n' stand-up-snare treatment. And the Grammys seem to have a thing for marching bands (see: "Hey Ya", "Gold Digger"). Whatever happens, you'll be able to see it go down live on your TV set this Sunday, February 8, at 8 p.m. ET/PT on CBS. Other performers include: M.I.A. (hopefully), Coldplay, Kanye West, Lil Wayne, Paul McCartney with Dave Grohl, Rihanna, T.I. and Justin Timberlake, U2, Jay-Z, and Katy Perry. I am wildly excited. Then again, I genuinely like Katy Perry.