"FRIENDS" GALS BUSTIN' OUT ALL OVER

BOOB JOB:

The male stars on "Friends" were stunned when cast mates Jennifer Aniston, Lisa Kudrow and Courteney Cox walked on the set with huge BREAST IMPLANTS! The guys stood with eyes popped until Lisa finally cracked up -- and the gals admitted they'd donned air bras that pumped up their busts!