Sunday, January 20, 2013 - R&B singer Keri Hilson sits in the waiting room at Mark Mahoney's Shamrock Tattoo in West Hollywood, CA, while Lady Gaga is inside....
April 25, 2010: We spotted fiancees Russell Brand and Katy Perry leaving Mark Mahoney's Shamrock Tattoo on Sunset Blvd on Sunday night. The couple was tight-lipped when asked if they got matching tattoos, but it looks like they were there...