Spring 2014 is the season of the guest appearance in ad campaigns, from Catherine Deneuve to Lady Gaga to Erykah Badu…

Louis Vuitton, Catherine Deneuve & Gisele Bundchen, photo Steven Meisel

Saint Laurent, photo Hedi Slimane

Missoni, Christy Turlington, photo Viviane Sassen

Kenzo, Devon Aoki & Paul Bosche

Versace, Lady Gaga, photo Mert & Marcus

Versace men’s, Nolan Funk, photo Mert & Marcus

Givenchy, Erykah Badu & Maria Borges, photo Mert & Marcus

Dior Beauty