Taylor Swift looks less than pleased at Jelena's backstage Billboard Awards reunion.

OK, so we knew that Taylor Swift and Selena Gomez were besties, and we knew that besties often feel protective of their besties, especially when there's a controversial ex involved. (The controversial ex in question here being Justin Bieber.) But we just need to stop everything immediately to discuss this one very candid moment at the 2013 Billboard Music Awards, where the "22" performer made her less-than-pleasant feelings toward Justin known in a single GIF-captured expression, and that single expression roughly translates to "YEEEUGH."

If you'll observe with us: Selena goes in for the "polite ex kiss" on the cheek, Taylor looks over, smirks, and WHOOPS, out comes the "EW, GROSS" tongue flash. AAAnd all we're gonna say is that we think the Spice Girls put it best when they said: "If you wanna be my lover, you gotta get with my friends." That's all. Better watch out, JB... you didn't date Taylor, but there's nothing stopping her from "accidentally" writing you into a song!

Photo credit: Billboard Music Awards / Reddit.com