Some buzz building as we head into tonight's "Face-off" debate, which this time around tackles the delicate question, "Is it okay to be fat?" Here is this preview by Cristina Kinon in this morning's New York Daily News, which emphasizes the topic's timeliness, given last week's messy weight debate between film director Kevin Smith and the customer of size policy at Southwest; and a model named Coco Rocha, now out of work at size 4. One one side of our panel is Crystal Renn, a plus-sized model and author of "Hungry: A Young Model's Story of Appetite, Ambition and Ultimate Embrace of Curves," and Marianne Kirby, co-author of "Lessons from the Fat-o-sphere." They will advocate against obsessive dieting, arguing that "thin" doesn't always mean "healthy." On the other side, MeMe Roth, outspoken president of the National Action Against Obesity, and Kim Bensen, author of "Finally Thin." They will advocate against an increasingly obese America, and praise the merits of responsible diet and exercise. Of course, this weight debate is filled with many shades of gray. It is up to Juju Chang, "GMA" news anchor, to moderate the discussion through the sensitive areas. The topic of the "Face-off," of note, grew out of this previous segment, entitled "Women Embrace the F-Word," about the fat acceptance movement. Big "Nightline" team effort in organizing this event and producing it for tonight's broadcast. See our own write-up here; a slideshow from the event at New York City's Cooper Union here; and embedded below is a segment from this morning's "GMA." And there is a huge amount of additional content available on the "Face-off" page at ABCNews.com.