"Calm down, birthday boy. Take a seat and let me do my thing," said Jennifer Lopez on 'Lopez Tonight' (weeknights, 11PM ET on TBS). Her "thing" was to don a slinky white evening gown and blonde wig and sing "Happy Birthday" to host George Lopez in the vein of Marilyn Monroe's famous rendition for President John F. Kennedy.

Watch the video after the jump. "Calm down, birthday boy. Take a seat and let me do my thing," said Jennifer Lopez on 'Lopez Tonight' (weeknights, 11PM ET on TBS). Her "thing" was to don a slinky white evening gown and blonde wig and sing "Happy Birthday" to host George Lopez in the vein of Marilyn Monroe's famous rendition for President John F. Kennedy.

Then, as in 1962, the TV broadcast turned black-and-white, and the stage went dark except for the spotlight on her hourglass figure. Like Monroe, Jennifer sang it slow and breathy: "Happy Birthday, Mr... Looopezzz..." Is she Marilyn Monroe incarnate? You decide.