Alexandra Burke will also sing for The X Factor judge
The X Factor judge is throwing a £250,000 bash at a Hertfordshire mansion to mark turning 50.
As well as ordering vintage pink champagne for the 350 guests, Simon has arranged for Leona, 24, and Alexandra, 21, to perform.
Friends and family have been asked to make donations to charity rather than forking out for gifts.
Simon has made it clear he doesn’t want presents,’ a source tells The Sun.
worried X Factor judges Dannii Minogue, Cheryl Cole and Louis Walsh
will start competing to see who can get him the most lavish gift.
He’s a very wealthy man already and just wants to make sure his nearest and dearest have a brilliant night.’
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