U2, Robert Plant, Kid Rock and Rihanna have all been added to the line up for the Grammy Awards in Los Angeles next month.

All four acts will perform live at the ceremony, which already boasts a bill that includes Radiohead, Sir Paul McCartney and Lil' Wayne.

Robert Plant will be joined by singer-songwriter Alison Krauss. The pair are nominated for five awards for their 2008 album 'Raising Sand'.

Rihanna is shortlised for three prizes, while Kid Rock has two nominations for Best Rock Album and Best Male Vocal Pop Performance.

U2 aren't nominated for any awards, but are due to release their new album, 'No Line On the Horizon' in March.

As previously reported, Sir Paul McCartney will team up with Foo Fighters' Dave Grohl for a special performance.

Rappers Kanye West and Jay-Z, who are both nominated for six awards each, will perform 'Swagger Like Us' alongside T.I.

Coldplay, Lil' Wayne and Jennifer Hudson are also set to appear on stage.

The Grammy Awards will be broadcast live from the Los Angeles’ Staples Center on February 8th.

(by Jason Gregory)