BIRMINGHAM: Courteney Cox‘s friends fear she has gone too far in her quest for eternal youth. Sources say the 49-year-old can’t get enough of the latest cosmetic procedures now that she’s dating 37-year-old Irish rocker Johnny McDaid. “Since Johnny came on the scene, Courteney is even more paranoid about looking her age,” a source told American tabloid the National Enquirer. “She’s constantly searching for the latest treatments to keep looking young.” The source says Cox has “totally overdone” the treatments, “and it’s a shame. In the past, she prided herself on having ‘stealth’ treatments and regular freshen-ups that weren’t obvious.–SY