Fred Armisen has proven he's one of the greatest comic actors of all time, and his show Portlandia proves he's also a talented comedy writer, but according to this interview segment from Conan impressions are his specialty.
In fact, the talented Mr. Armisen can imitate any accent in the world with such precision even a native speaker can't tell the difference. Watch and have your world transformed.
Apparently he's also amazingly good at doing all of New York's accents as well, which he bravely demonstrated for nearly five minutes in front of New Yorkers at a benefit back in 2014.
-Via Laughing Squid