Behind-the-scenes beauty is no longer behind the scenes! The latest celebrity social media trend is sheet mask selfies. Whether scary, silly or outrageously glamorous, more and more celebrities are sharing this part of their beauty routines online. 

Sheet masks - and sheet mask selfies - have been gaining buzz over the past year or two, but they've finally become as ubiquitous as a duck face selfie to show off a new lip color or a salon selfie revealing a new hairstyle. In the past week, Kelly Osbourne, Alexa Chung and Lady Gaga have all shared sheet mask selfies. All three stars went for silly over glamorous, with Alexa even making a "Silence Of The Lambs" joke: "Put the lotion in the basket." 

Sheet mask selfies don't have to be silly or scary: As you might expect, supermodels Karolina Kurkova and Karlie Kloss made sheet masks look positively luxurious with pre-Met Gala selfies earlier this month.

In March, Bella Hadid combined both sides of the selfie trend with a silly over-the-top pose captioned, "I'm such a diva today." 

Early adopters of the sheet mask selfie trend include Chrissy Teigen (May 2012), Rita Ora (April 2013), and, funnily enough, Chris Pratt (July 2014). However, for a long time, sheet masks and sheet mask selfies were available only to celebrities and jet setters; in her May 2012 selfie, Chrissy Teigen jokes about finally finding sheet masks duty free. 

In the past year, Korean sheet masks and those inspired by them have become more widely available in the US and are now easy to find at every price point. Shop some of our favorites below - and don't forget to snap a selfie. 

Beauty Buzz: Sheet Masks

Sephora Face Masks, $6.00

Dr. Jart Water Replenishment Cotton Sheet Mask, $7.50

Karuna Luxe Skin Restoring Treatment Mask, $48.00

WEI Beauty Gingko Leaf Repairing Face Treatment Pads, $68

This article was originally published on Fashion & Style.