“Welcome to Lopez Tonight, where nobody gets fired, they just get replaced by a bigger star with the same last name.” That’s how Jennifer Lopez opened her monologue on George Lopez’s late-night TBS chat show Monday. Honestly, I haven’t enjoyed J.Lo this much since Out of Sight. She was dancing, smiling, rattling off Sarah Palin, Conan O’Brien, and male prostitute jokes. If George ever needs a vacation, she should be his replacement. (If she doesn’t parlay her recently announced guest-role on Glee into series regular, that is.) Watch her stand-up, below.