Underage hitmakers nineteen year old Rihanna and twenty year old Cassie were denied entry into Fabolous ‘ album party at NYC’s Runway Nightclub late last week. The trouble stems from “Operation La Lohan-” major cities are cracking down on nightclubs who serve alcohol to celebrity minors (ie: Lindsay Lohan). Reps for host Level Vodka enforced the new ‘Lohan’s Law’ by checking IDs.