'Sierra Burgess Is a Loser': Shannon Purser on Bullying + Barb'Sierra Burgess Is a Loser': Shannon Purser on Bullying + BarbShannon Purser gets real about her new Netflix teen rom-com 'Sierra Burgess Is a Loser,' body diversity onscreen, and working with Troye Sivan, Allie X and Leland.Erica RussellErica Russell