Cameron Diaz Turns 54 -- Then & Now, Good Genes or Good Docs?!

Cameron Diaz doesn't need to wear a "Mask," 'cuz her genes over the years have been ... "SMOKIN'!" Here is 21-year-old version of the blonde bombshell at the 47th Annual Cannes Film Festival back in 1994 (left). This was just a couple months before…