Popstar Lady Gaga hit up legendary tattoo artist Mark Mahoney Saturday night and walked away with a David Bowie "Ziggy Stardust" on her side. Gaga strolled into Mark's WeHo shop, "Shamrock Social Club." Gaga drew quite the crowd, but it all went down behind closed doors. Los angeles, CA, USA, February 13, 2016. Photo by GSI/ABACAPRESS.COM15/02/2016 - Los Angeles - Photo