The ANGELS hitmaker already has one date booked at the Croke Park Stadium, but when he tried to book a second slot the following day he faced competition from LORD OF THE DANCE Flatley, who also wishes to perform.
Ireland's largest sporting organisation, The Gaelic Athletic Association (GAA) owns the venue and only grants permission to three shows a year. US rock band Bon Jovi and Williams have reserved two of these places.
Flatley hopes to grab the third and fulfil a lifelong ambition by dancing his new CELTIC TIGER extravaganza at Croke Park.
Negotiations are still under way.