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Jack Antonoff's band Bleachers appeared on "CONAN" this week where they performed their song "Rollercoaster" ... and did you know they have fun-sized doppelgangers?! 

The band performed the song with their respective mini-mes and it was adorable! 

today at conan

A photo posted by jack antonoff (@jackantonoff) on

if this doesn't thrill you .. i can't be a help. double shiffman / mandel / floating strange desire

A photo posted by jack antonoff (@jackantonoff) on

Check out the performance below!