Cowell promises 'big changes' for 'X-Factor'

Simon Cowell has promised some "big changes" in this year's 'X Factor'.

The 51-year-old music mogul – who is taking the show Stateside this spring – explained making format changes to 'Britain's Got Talent' has worked well, and he also plans to make the new series of 'The X Factor' "bigger, better and stronger".