I don't really keep up on Beauty trends cos i know how I like to wear my hair and makeup by now and what works for me. Last one from a few years back that I didn't understand was the super thin eyebrow trend... looks shite in my opinion. Also that whole woman/girls should have big asses trend can fark off anytime now;)
Agreed with the thin eyebrows... I say rock whatever you got and DON'T GET RID OF THEM cuz inevitably you'll want them back next time the trend changes. And that's exactly what happened!
Haha, I happen to benefit from that trend... But also part of the itty bitty titty committee, alas.
You can pick whatever you want from the past ten years. Vell there is a notable one I became aware of recently. Dying the 2 inched of hair closest to the scalp bleack, presumably for the 2-color effect. Look at Ivanka Trump, her 'dark roots' are always the same length (it must cost a lot of money and time at the hairdresser)
It's one of those things that used to be accidental and now people do it on purpose because it's suddenly cool. I find it fascinating how this happens all the time.
Please dont scare me Harry;(( 
become bald from back;)) 
Benedict Arnold 