Three years ago, I was wasting away on the internet when I came across a picture of Cara Delevigne. This was before she became Taylor Swift's lovable henchwoman, before she was a common household name.

"Bleh, that UNIBROW, tho," I thought to myself. At this point in time, the girls I knew were generally still tweezing the mess out of their brows. Thus, Cara's new, vogue, statement-brows were jarring and abrasive. "Somebody get that girl to the threading kiosk in the mall, AMIRIGHT?" I shook my head dismissively.

Over the next few months, however, my feelings began to change. Bombarded with images of thick-browed models, what was once unsettling became new and fresh and beautiful. Like pickled beets and green olives, it seemed as if the edgy, bold-brow look was an acquired taste. It wasn't long before I myself invested in an eyebrow kit of my own, diligently penciling in my blonde brows on a daily basis. I watched tutorials on how to frame my face and eyes. I even considered tattooing darker brows on my face. This went on for nearly two years.

Then, not ten days ago, I saw this picture. And with the flippancy of a love-sick teenager, I decided my eyebrow phase was over. I wanted bleach. Bleach everywhere. "I'm going for a young Gollum type of a look," I told my bartender.

I let my brow wax run dry. My defining pencil became a neglected nub. I unfollowed Cara Delevigne on Instagram.

Fickle, I know. And petty, too.

But wait. There's a valuable lesson to be gleaned from what at first glance might seem to be a trivial post. And it's not that you should always be yourself. It's this:

Beauty "standards" are mostly in your head. And they mostly got there through social media and advertising. And they'll probably change. Last year we wanted Kylie Jenner's lips, Kendall Jenner's thigh gap and Caitlyn Jenner's calves. Or at least I did. And next year it'll be something else.

So before you buy Nicki Minaj's butt (which, yes, I have sadly considered), think twice. That bird tattoo you loved last year? It's over now. But two million girls still have two dozen sparrows flocking out of ungodly places on their arms and torsos. Those birds are forever, people!

My advice? Embrace trends. If you feel like it. But keep it casual.

Don't overcommit.