If you've watched Netflix's sci-fi series Stranger Things, you are probably familiar with Barb, the seemingly plain friend of Nancy who captured the hearts of viewers with her cute cropped red hair and giant spectacles, becoming the surprise sweetheart of the series. Barb-mania is sort of a phenomenon, so when her character was heartlessly left to die at the hands of the demogorgon (oh, spoiler alert btw), dreams of Barb's return were crushed. That is, until she resurfaced on Wednesday night's episode of The Tonight Show with Jimmy Fallon.