Fashion news: Steve Madden now owns Betsey Johnson, a DVF beauty line and Snooki wants a clothing line

Rumour has it that Steve Madden is in talks with Katy Perry to collaborate on a clothing line. [New York Post]

Health Canada has issued a warning saying the popular Brazilian Blowout hair treatment contains unacceptably high levels of the carcinogen formaldehyde. [Globe & Mail]

Rihanna, Lady Gaga and Katy Perry text each other before they make their red carpet appearances to avoid the most egregious of fashion faux pas: wearing the same dress. “My worst nightmare would be a clash on the red carpet – so we all text each other before to make sure,” Rihanna told The Mirror. [Styleite]

Diane von Furstenberg will be launching a beauty line this fall beginning with a fragrance. [WWD]

“People I respect complimenting me on my work in fashion is more exciting to me than anything I ever achieved as a Spice Girl,” Victoria Beckham tells Marie Claire. “I was never going to give Mariah carey any competition.” [StyeList]

Sephora has launched a new iPod and iPad app that allows users to view how-to videos and make purchases right on their phone. [WWD]

Snooki is the latest Jersey Shore cast member to voice interest in starting her own fashion label. [Fashionista]

Skechers new shoe line Bobs looks a lot like Toms slip-on shoes. And they too will be donating a pair of shoes to a less fortunate child. [Refinery 29]

Gap says their logo change is not a publicity stunt. [Advertising Age]