**FILE**Singer Andy Williams performs July 22, 2001, in Beverly Hills, Calif.  Williams has postponed a tour of Hong Kong, Japan, Thailand and Singapore because of worries over the spread of bird flu in Asia, his Singaporean concert organizer said Thursday, Jan. 29 2004.   Williams, 76, decided to reschedule &quot;because of his age and health issues,'' said Aris Liu.  The Singapore concert, originally planned for March 6, will take place in July, Liu said. The dates for the other concerts were not immediately available. (AP Photo/John Hayes,file)  HOUCHRON CAPTION (03/09/2004):  Williams. Photo: JOHN HAYES, AP / AP