Welcome back. Without tim gunn, would we ever be able to make it work? His new must-have reference book for every fashionista hits shelves today. It's called "tim gunn's fashion bible." It covers... See More
Welcome back. Without tim gunn, would we ever be able to make it work? His new must-have reference book for every fashionista hits shelves today. It's called "tim gunn's fashion bible." It covers everything, from togas to t-shirts. He does not love them all. He's here to tell us all about it. Thank you, lara. It's a pleasure to be here with you. Especially someone as fashionable as you. Thank you. That's a giant compliment. In the book, you talk about the biggest fashion crimes in history. Tell us what you believe it is. Actually, there's so many of them. For me, it's an item of footwear. The ubiquitous croc, I must say. As long as we've been walking, we've been putting things on our feet. But this is a major step backwards. I hope mario batali has ear muffs on now? He loves them. Does he wear them on the red carpet? Think he's always wearing them. Well. I'll tet you up for an appointment. I may have to talk to mario. You also talk about capri-length cargo pants as a do not. I don't understand why they're so popular. I shouldn't say that. I get it. When you're wearing a pair of cargo capri pants, the only thing you have to worry about fitting is the waist. But they make you look visually shorter. If you're going for the bohemian, make it full-length? Exactly. What is the difference as you talk between the cleopatra or the helen? We have our inner. This is about dresses, specifically. And about tracing the lineage of dressing. If you like drape dresses, they go back to ancient egypt. And I cite helen of troy as the fashion icon. If you like tailored clothes, you would go to cleopatra. I'm a little cleopatra. I want to talk about the big fashion moments. And the cast of "dynasty" is among them. The cast of "dynasty," DEFINED THE '80s. How over the top was all that? The exaggerated shoulder pads. The bigger than life power suit. And everything old is new again. A modify version, we're seeing all of it. We are. What's your fatakeaway fashion advice for this season right now? In terms of what to run out and buy? So many women do not own a blazer. They're running around in jeans and t-shirts. Go find a fashionable blazer. They come in a myriad of styles and colors. "The fashion bible," it is out today. Thank you so much. Thank you for teaching us about our inner helen of troy or cleopatra. When we come back, on top of
This transcript has been automatically generated and may not be 100% accurate.