London, Sep 15 (IANS) 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.