This year's Billboard Music Awards highlighted two of our favorite trends: Huge cut outsand the two-piece "dress." We're not sure why the red carpet has been inundated with outfits like this lately, but we're very glad they have. From a see-through ensemble from Britney Spears (who performed her greatest hits and sported abs of steel that look like they're straight from 2000) to a sideboob show from Ciara, this year's awards ceremony cleaned up—by dressing down. Check out a few of our favorite skin-baring looks above.