United Kingdom, Feb. 19 -- Apple Martin has blamed her spot outbreaks on "stress".

The 21-year old is only months away from her graduation after studying law, history and society at Vanderbilt University in Nashville, Tennessee, and has now captured her skin troubles in a beauty tutorial.

Filmed on behalf of Vogue and shared by her mother Gwyneth Paltrow's Goop site, Apple told fans: "I know I still have a little bit of blemishes and such, but it was really bad in high school."

She also advised viewers: "The more that you stress about it, the worse it will get, most likely. This is all stress, so... ."

The video saw Apple go through the long ritual she uses to conceal her spots, blemishes and dark circles beneath her eyes.

She added ...