THE groupies who slept with Tommy Lee and Nikki Sixx during their hell-raising Motley Crue years may want to have themselves dry-cleaned after reading “Rock Star Babylon.” In his compilation of outrageous rock ‘n’ roll stories, out in June, Jon Holmes recounts how the debauched drummer and bassist “decided to hold a competition between them to see who could go the longest without washing, showering or bathing in any way, yet still be able to sleep with groupies without them being ill or bailing out.” For two months, the duo had “nightly groupie sex” with up to four girls each – until finally, a young fan performing a sex act on Sixx became violently ill on him. It later became known as “The Spaghetti Incident” because the unfortunate groupie had eaten pasta beforehand.