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Happy Halloween, everyone! In the spirit of the sinisterly wet, dark holiday, Taylor Swift revealed her delightfully adorable costume. Ripping a (blank) page from her just-revealed new single “Blank Space,” the singer-songwriter took to Instagram to break the internet, with a caption reading, “Cause, darling I’m a nightmare dressed like a PEGACORN. #HappyHalloween!”

Cause, darling I'm a nightmare dressed like a PEGACORN. #HappyHalloween!

A photo posted by Taylor Swift (@taylorswift) on

This wonderful event comes off the heels of news that Swift’s electro-dance ’80s pop album 1989 is projected to beat 2012′s Red (which shifted 1.2 million copes first-week). The new 13-track record, featuring an Imogen Heap collaboration, is set for 1.2-1.25 million copies. Of course, we won’t known official SoundScan numbers until next Wed. (Nov. 5).