Bruno Mars, B.O.B, Janelle Monae, Muse and Justin Bieber have been added to the line-up of acts to perform at next month's Grammy Awards, it has been reported.

The artists will join other confirmed acts Lady Gaga, Arcade Fire and Eminem, Rolling Stone reports.

Eminem leads the way in nominations, with Bruno Mars and Lady Gaga receiving seven and six nods each. Other nominees include Katy Perry, Justin Bieber and Rihanna.

The ceremony takes place on February 13.

Meanwhile, Lady Gaga has been backed to wear Paul Daniel's wig after the magician put it up for sale on eBay.

(by Holly Frith)