FASHIONPhotos: Under the SkinPop’s favorite tattoo artist, the self-proclaimed Bang Bang, dishes on his new book.by Sue Williamson11.10.151Rihanna and Bang Bang. Courtesy of the artist.2Cara Delevingne. Courtesy of Bang Bang.3Justin Bieber leaves his mark on Bang Bang. Courtesy of the artist.4Rita Ora. Photo by Norval Ramirez.5Bang Bang prepares Cara Delevingne for the 2015 Met Gala. Photo by Gurber Mathews Photography.6Rihanna. Courtesy of Bang Bang.7Katy Perry tattoos Bang Bang. Courtesy of the artist.8Bang Bang. Courtesy of the subject.9Rihanna. Courtesy of Bang Bang.