FARMINGTON, Pa. The billionaire owner of 84 Lumber could have only one 84th birthday party, so Joe Hardy's children were apparently determined to make it one to remember.

Pop diva Christina Aguilera sang happy birthday to Hardy, who turned 84 yesterday. Bette Midler performed backed by an orchestra. Comedian Robin Williams was the after-dinner performer.The party ran from two Saturday afternoon until two o'clock Sunday morning so thee 500 guests could be there when the clock struck midnight to ring in Hardy's birthday.

The Pittsburgh Post-Gazette reports today that guests included former Governor Ed Rendell, former Governor Tom Ridge and Pittsburgh Steelers player Troy Polamalu (pah-lah-MAH'-loo).