She showed this machine which can show what you'll look like in 20 years, where you'll have pimples the next day, problem areas, and where you'll get wrinkles. It was pretty cool. haha there was this 24 year old girl who has been visiting the tanning bed since she was 8, and she said "Oh, well we're all going to die from something anyway." That was until she saw how she'd look in 20 years (she looked cracked out).
Then it showed the story of this girl who had severe acne, scars, low self esteem etc, and of course Tyra sent her off to one of the best dermatologists around so she turned out gorgeous.
And Tyra's biggest skin secret was moisturizing her breasts every night with lotion to avoid stretch marks. I've seen that episode before, and saw it again today, but had to leave half way through to go to a hair appointment. :]