Jennifer Lopez subs for George Lopez on his talk show. Look out, Jay Leno!

Jennifer Lopez took over for George Lopez on his talk show Monday (Jan. 18).

Wearing a slashed tailored white pantsuit and black top, ( way better than her New Year's Eve catsuit) Jennifer -- not George -- shimmied (backwards) down the stage, danced with the crowd and started off her monologue with: 

"Welcome to 'Lopez Tonight,'" Lopez, who may appear on an episode of our fave show, "Glee," shouted, "Where no one gets fired, they just get replaced by a bigger star with the same last name."