Grammy nominations concert: major categories – in pictures

Bruno Mars, who has been nominated in six categories including the top categories of best record, best album, best song and pop vocal album Photograph: Matt Sayles/AP

Jason Aldean, nominated for best country album, on stage with Ludacris Photograph: Kevin Winter/Getty Images

Katy Perry announces the album of the year nominees Photograph: Mario Anzuoni/Reuters

Lady Gaga, nominated for best album and pop vocal album Photograph: Lester Cohen/WireImage

Lupe Fiasco, nominated for best rap album Photograph: Mario Anzuoni/Reuters

Nicki Minaj, nominated for best new artist and best rap album, performs with LL Cool J Photograph: Frederic J Brown/AFP/Getty Images

The Band Perry, nominated for best new artist Photograph: Frederic J Brown/AFP/Getty Images

Nominations for Adele (file photo) include record of the year, album of the year and song of the year Photograph: Joel Ryan/AP

Host LL Cool J speaks to the cameras during the live broadcast Photograph: Frederic J Brown/AFP/Getty Images

Rappers Common, LL Cool J, Melle Mel and Scorpio perform at the concert Photograph: Kevin Winter/Getty Images

Usher performs during the nominations concert Photograph: Kevin Winter/Getty Images