They're a couple of hardy perennials in the world of Web searches, and now, apparently, they're a couple. Motley Crue Bassist Nikki Sixx are Denise Richards are dating, according to US Weekly. Richards gained notoriety in the '90s in the films Starship Troopers and Wild Things , but she is best-known for surviving a tumultuous marriage to Charlie Sheen. After leaving Sheen, Richards had her own reality show and for a time hooked up with Bon Jovi guitarist Richie Sambora. The hard-living Sixx is working on a follow-up to his best-selling book, The Heroin Diaries , which chronicles his descent into addiction during the mid-1980s heyday of Motley Crue.