During red carpet season, the main trends that show up on celebs always manage to trickle down to us non-red carpet walkers. There was the peplum dress that basically defined 2013. Then, there was that high-low silhouette that became the go-to for both celebrities and normals. This year, no clear dress trend has really broken out...until now. During tonight's AMAs Selena Gomez showed off the dress shape that you're going to spot at every single holiday party you'll go to this year. We're talking about the pencil dress.Gomez, who will be performing at tonight's awards, rivaled the red carpet in a jaw-dropping, open-back sequined number of the same (albeit much more sparkly) hue. The dress is from Givenchy's spring '14 collection , although it wasn't exactly plucked straight from the runway. When we first saw it on the catwalk, look 26 had a longer, ankle-grazing cut and, instead of the pencil fit, the skirt was looser and more flowy. For the AMAs, Gomez cropped the hem closer to a midi length, giving it a formfitting finish.If the ruby sequins weren't eye-catching enough, all it took was a pose change for Gomez to pack the final sartorial punch. The black tubing that outlines the halter neckline opens up in a low, low back, making for some dramatic posing.