But Rosen's biggest new venture, a glossy, year-old events magazine called Live!, is losing money.
Though the show gets glossier each year as the TV industry booms, Dior and Chanel are still conspicuously absent; their headline frocks wrapped in perspex, awaiting the Oscars and the Met Ball.
Weiss, a former fashion assistant who launched Glossier several years after creating Into the Gloss — a site about women's grooming routines that now attracts 1.5 million unique visitors monthly — also talked about the role of content in growing her business.
The floor was bamboo slats, worn to a glossy smoothness by years of bare feet.
Beaming into the cameras as two middle-aged male presenters placed a silver crown on her impeccably glossy hair, 19-year-old Giulia Arena looked delighted to have emerged victorious from the 2013 Miss Italia contest.
For many years, glossy magazine stories about the high life in Dubai were the only journalistic diet one could get.
And there were more disappointing figures in the women's glossy sector - with year-on-year circulation drops for Glamour, Cosmopolitan, Good Housekeeping, Yours, Company and New Woman.
But there is plenty to work with: years of press coverage; a vivid, if glossy autobiography; a 10-year analysis with none other than Erik Erikson, whose diagnosis was that the artist had painted, rather than lived, his happiness.
Most of the classics are constantly rehashed, repackaged and regurgitated around this time of year in glossy new incarnations.
This kind of public positioning in among the most-read glossy issues of the year may give some designers pause, as any clear political leaning risks alienating a swath of potential customers.
Justine Southall, the publishing director at Cosmopolitan, says that last year the glossy had its best year ever for advertorials – and this year is also on track for a strong result.
