This isn't Mark Zuckerberg from Facebook.
1.) Doesn't look like him; different facial features.
2.) They're both the same age. Makes no sense of the look discrepancy. They both didn't look like this in their youth. Which coincides her style during the height of het popularity. She looks too old to be in the "youth" stage.
3.) The lighting and selfie angle indicates 2010's+. Selfies wasn't a thing before smartphones/digital cameras. It was a rare thing to do before digital cameras because it would usually lead to a bad shot (blind shooting) and wasted film ($$$).