Wolf Blitzer was the first to pop up on the screen, catching Cooper completely off guard. One after another, CNN faces like Michaela Pereira, Dr. Drew, Randi Kaye and John Berman sent Cooper their very creative birthday wishes.
It seems that Cooper's colleagues crashing "AC 360" with a birthday surprise is becoming somewhat of a tradition. Last year, Blitzer took over and dedicated the "Ridiculist" to Cooper's infamous giggle fits and toned body.
Watch the video above to see the surprise.