Paris Hilton -- Good Genes Or Good Docs?!

Paris Hilton's good looks just keep getting better!

Here is a 19-year-old version of the socialite showing off her sweet layered locks at a party in Beverly Hills back in 2000 (left). This was the same year Paris and her sister Nicky got the world's attention after being featured in an issue of Vanity Fair together.

And, 20 years later ... The 39-year-old celeb went on to launch tons of big businesses, appeared in a number of films and television shows, and has released new music as a world-famous DJ. The busy lady was seen just a few weeks ago looking better than ever in Los Angeles (right).

She's hot!

The question is ...