Plaid: A #BigDealAlert in the Celeb Style World Right Now

If you haven't noticed, the '90s are back. Grungy plaid flannels are abundant both in the streets and on the red carpet, but these are the stars that are going full force with the trend.

Plaid = #AlwaysTrending, just like OKMagazine.com! Rita Orta didn't just stop with her pants, she worked a matchy matchy jacket as well.

How Ciara styles plaid in Paris. C'est chic.

Another celeb feeling the tied-around-the-waist plaid flannel was Hailee Steinfeld at the Teen Vogue party.

Ms. Lea Michele sported a casual day look consisting of a Rails plaid blouse with denim cut-offs. Cute!

Janelle Parish opted for blue checks over the classic red. We're pretty sure Mona would approve. Or maybe not.

Clean lines are always classy—just like Katie Holmes.

The '90s called and they said "keep on rocking the trend JH, keep on."

Reese Witherspoon wore a Rails plaid button-down at the airport recently. Lookin' good Reese!

Kat Graham channeled Cher in Clueless during New York Fashion Week. Grunge over? As if!

We're pretty sure V Hudge pulled this entire ensemble from the My So Called Life wardrobe archives.

Maria Menounos werks a navy plaid suit at work. Into it.

Emmy Rossum paired her Joe's 'Dandy' woven shirt in red-navy plaid with a leather bomber in NYC.

Ashley Greene proves plaid is perfect for a daytime date look. Loving her tan Koolaburra 'Notela' boots too!