Rodarte's Kate and Laura Mulleavy costumed actors for the film Bastard — a Tribeca Film Festival competition short directed by Kirsten Dunst.

Ann-Sofie Back will show her fall 2010 collection and her diffusion line, Back, at Shanghai Fashion Week.

Short films from Love magazine, Fashionair, and Steven Meisel for Prada make the cut for best fashion videos of the season.

The Wall Street Journal argues the value in high-priced designer sweatpants.

“It’s always our responsibility [as designers] to be challenging — to challenge our customers and to innovate our trade. Otherwise, this one has a line and J. Lo has a line — everybody can have a line and call themselves a designer. But I think that’s kind of demoralizing for our trade.”—Francisco Costa on celebrity designers during a talk at the Cooper-Hewitt museum.

Source: Getty

>> Proenza Schouler, Andre Leon Talley, and Elle's Robbie Myers All to Appear on The Martha Stewart Show —Starting tomorrow, The Martha Stewart Show is having a three day run of fashion fixtures. First, on Tuesday, April 6, Proenza Schouler's Jack McCollough and Lazaro Hernandez will be live on the show for a tie-dye scarf how-to; then, that afternoon, Andre Leon Talley will be in studio to chat about America's Next Top Model and make brioche with deviled eggs — for an episode airing Friday, April 30. And finally, on Wednesday, April 7, Elle editor-in-chief Robbie Myers will be live on the show for a "Designers to Watch" segment.

>> Francisco Costa, Maria Cornejo, and Yoehlee Teng touched on everything from model casting to celebrity dressing to eco fashion last Thursday night at the Cooper-Hewitt museum in New York as part of the “Voices in American Fashion” panel, moderated by The Washington Post's Robin Givhan.

Costa, who is known for his unique show casting, voiced one vision for a Calvin Klein show that he hasn't yet fulfilled — street casting. "I wish to be able to just go into the streets and just start going. As a concept, I would love to do that someday."

Cornejo rebutted: "I have to say, the first show I did in New York, I did have all real people, only one model, and it bombed. The editors do not want to see the clothes on real women. It's more exciting for them [to see the clothes on models]. They want to be able to say: 'Oh, I shot her last week.'"

Both designers agree, however, when it comes to using young models »

Karl Lagerfeld, who reportedly lost 90 pounds in 2001 by consuming only Diet Coke and steamed vegetables and has been known to employ Diet Coke butlers, is now popping up on a series of limited-edition bottles of his favorite zero-calorie treat. A silhouetted Lagerfeld in profile and scripted signature adorn the white, pink, and black package — a collectable available at Galeries Lafayette and Colette as a limited-edition boxed version of the bottle, with matching bottle opener, priced from 47 euros, or $64 at current exchange

Lagerfeld chose Coco Rocha and Baptiste Giacobini for the ad campaign, photographing the former holding his favorite Lalique crystal goblet.