U2, Kid Rock, Plant/Krauss Added To Grammys

U2, Kid Rock, Rihanna and Robert Plant and Alison Krauss have joined the performance lineup for the 51st Grammy Awards, to be held Feb. 8 at Los Angeles' Staples Center and broadcast live on CBS.They join previously announced performers Kenny Chesney, Coldplay, Jennifer Hudson, Jonas Brothers, Lil Wayne, Paul McCartney (with Dave Grohl on drums), Katy Perry, Radiohead, T.I. and Justin Timberlake, Carrie Underwood, and Jay-Z, Lil Wayne, T.I. and Kanye West.The first batch of award presenters include Jack Black, Duffy, Josh Groban and Charlie Haden, along with actors Simon Baker, Samuel L. Jackson and Gwyneth Paltrow.