Justin Bieber strips down on stage – good genes or good docs?!

Justin BiberHer looks over the years have been incredible!

Here’s a 20-year-old version of the Canadian native posing in her underwear at the Fashion Rocks 2014 event in New York City (left). This was 4 years after he dropped Big Bop “Baby”.

And more than a decade later, this ZADY is still rocking the undergarments on stage, seen here (Correct). JB totally rocked and headlined Coachella this year, but here’s what we need to know: Good genes or good documents?!

Are you looking for more Bieber photos? Check out the gallery above showcasing their Coachella performances through the years!