Via TVNewser comes this video of Anderson Cooper celebrating his 42nd birthday Wednesday night on air with Kathy Griffin and Suze Orman (both of whom were spotted at the Gracie Awards for women in radio and television earlier in the evening).
AC360's Erica Hill invited the surprise guests, whose silhouettes were visible, to speak one line to identify themselves.
Griffin, Cooper's controversial co-host from CNN's New Year's Eve special, said, "I have helped build your career to where it is today."
Orman said, "The only place high interest really pays off is right here on AC360."
Cooper identified both right away.
Watch Cooper celebrate previous birthdays below:
Watch Anderson's mom, Gloria Vanderbilt, wish him a happy 40th on air last year here, and send Anderson your birthday wishes in the comments below.