Rebracketing of spectacular.

-tacular

1. (slang, often ironic) Used to form adjectives denoting some type of exceptionality.
   • 2016, Jacqueline Warwick, Allison Adrian, editors, Voicing Girlhood in Popular Music‎^[1], Routledge, →ISBN:

     Sound bites from reporters said, “Miley Cyrus’s JAW-DROPPING TWERK-a-thon,” the “twerk-tacular,” “twerk-and-tongue work,” in the “twerk seen ’round the world!”

• -riffic, -tastic, -licious