MrSkin.com, the internet repository of film and TV nakedness, celebrates its 18th birthday ("We're finally legal," says its CEO) with screenshots of stars from Angelina Jolie to Alison Brie plastered high above Hollywood Boulevard.

There may be more squinting these days on the streets of Hollywood. To mark its 18th birthday, MrSkin.com, the web's top repository of mainstream screen nudity, erected a billboard July 30 at the corner of Hollywood Boulevard and La Brea Avenue featuring screenshots from all 43,412 female nude scenes on its servers.

"We launched on Aug. 10, 1999 — we're joking that we're finally legal," says Mr. Skin himself, CEO Jim McBride, a 54-year-old father of three from Chicago. The site, which sees 9 million uniques per month and costs $72 a year for full access, hit the big time when Judd Apatow heard McBride on The Howard Stern Show and wrote it into 2007's Knocked Up — "the second-best movie product placement of all time, after E.T. and Reese's Pieces," gushes McBride.