Tourists on top of 30 Rockefeller Plaza in New York City in 2014 thought that they were getting their photos taken for the building’s website.
WATCH: George Clooney And Julia Roberts on Carpool Karaoke w/ Gwen Stefani
Little did they know that Golden Globe winning actor Jon Hamm and The Tonight Show host Jimmy Fallon were making side-splitting guest appearances behind their backs.
(WATCH the hilarious montage above)
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