TAYLOR SWIFT GOOD GENES OR GOOD DOCS?

12/14/2014 12:05 AM PST

Taylor Swift: Good Genes or Good Docs?!

Taylor Swift's beauty is anything but a "Blank Space." 

Here's a 17-year-old version of the pop singer at an awards show back in 2006 (left) and eight years later ... the international sensation -- who celebrated her 25th birthday this weekend -- at a ball last week (right).

"Shake it off."

The question is ...