Why don't any teenage celebs get acne?

Every teenage celeb has the clearest skin ever. I'm talking about: Taylor Swift Jonas Brothers Vanessa Hudgens Miley Cyrus Demi Lovato Selena Gomez Shenae Grimes etc. Do they have some magic solution they use or are their makeup artists more talented that I thought? Even if they started in the biz... show more Every teenage celeb has the clearest skin ever. I'm talking about:

Taylor Swift
Jonas Brothers
Vanessa Hudgens
Miley Cyrus
Demi Lovato
Selena Gomez
Shenae Grimes
etc.

Do they have some magic solution they use or are their makeup artists more talented that I thought? Even if they started in the biz when they were little kids their skin still stays clear during their teenage years. any thoughts?
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