WATCH: Anderson Cooper Gets Surprise Birthday 'Mini-Roast'

In what seems to have become a tradition at CNN, Anderson Cooper was interrupted on-air during his Anderson Cooper 360 show's "Ridiculist" segment Tuesday night by fellow CNN host Wolf Blitzer. Blitzer first mockingly lauded the day as the birthday of singer Deniece Williams before mentioning Cooper's own. Blitzer then introduced a series of playful "tributes" from a string of CNN on-air personalities including Michaela Pereira, Randi Kaye, John Berman, and Dr. Drew.

Particularly funny in this segment is Cooper saying, "The other day on the street I had someone yell at me 'Hey, Dr. Drew!' and I was like 'Fuck you.' Sorry." (The f word was bleeped, of course.)

Also very funny is Randi Kaye, an investigative reporter for AC360, jokingly telling Cooper that she thought he might enjoy a "really cool" limousine tour of Denver as video of people obviously smoking large marijuana joints played in split-screen, and CNN morning anchor John Berman showing off an AC360 Snuggie.

Blitzer invaded AC360 a year previously as well, playfully jabbing Cooper as he narrated a series of clips of the host cracking up and laughing on-air. Watch this year's birthday roast below.