The Spice Girls star Victoria Beckham is to bare all as part of an advertising campaign for fashion designer Marc Jacobs. The 33-year-old will follow in the footsteps of stars including Julianne Moore, Dita Von Teese and Naomi Campbell who have stripped for Jacob's charity t-shirt collection in the past. Beckham was originally signed up to model the designer's forthcoming spring/summer 2008 fashion line, but was then asked to get naked for the revered campaign, which aims to raise money for skin cancer charities. Jacobs raised $60,000 (GBP30,000) for good causes in 2006 with the previous line of t-shirts which sold in the designer's stores for just $5 (GBP10). A source tells British newspaper the Daily Mirror, "Victoria loves Marc's work but wasn't entirely comfortable with getting naked. Marc went all out to persuade her. "And when she heard about what a great cause it was she knew she just couldn't turn him down. The picture she and Marc have chosen is amazing - sexy but tasteful."