Music mogul Simon Cowell has reportedly roped in popular singers like Lady Gaga, Katy Perry, Mariah Carey and Susan Boyle to perform on the British singing reality show "The X Factor".
Cowell, 53, wants to make the Sunday result episodes a big hit. He has also tied up with popular One Direction band to perform on one of the result episodes, reports dailystar.co.uk.
Singer Robbie Williams is expected to sing a duet with one of the singers on a song from his recent album "Swings Both Ways".
A host of contestants from previous "The X Factor" are set to appear, including 2009 runner-up Olly Murs, 29, and last year's winner James Arthur, 25, on the show.
