Ewokalypse
Ewokalypse is a Twitter hashtag started by Australian pop-punk band 5 Seconds of Summer on May 22, 2014, after the group swapped their profile pictures to images of Ewoks from Star Wars. Fans piled on with derivative hashtags and Photoshopped edits that pasted Ewok faces onto the band members, pushing the tag past 220,000 tweets in under a day.
Overview
Ewokalypse is a Twitter hashtag that Australian boy band 5 Seconds of Summer pushed out on May 22, 2014 as a tribute to the Ewoks, the small mammal-like creatures from Star Wars1. The joke started when all four members swapped their Twitter avatars for pictures of Ewoks, then leaned into the bit with the tag itself.
What pushed it past a stunt was the fan response. Followers ran a Photoshop meme that pasted Ewok faces over the band members in group photos, and they spun off spinoff tags for renaming 5SOS songs with the word Ewok in them3. The whole thing lived and died inside a two-day window on Twitter.
How It Spread
How to Use This Meme
Participation typically meant one of two things: tweeting with #EWOKALYPSE while riffing on Star Wars or 5SOS lyrics, or posting a Photoshop edit that swapped a band member's face for an Ewok's. The related tag #Replace5SOSSongsWithEwok followed a common convention of dropping the word Ewok into a real 5SOS song title (for example, turning "She Looks So Perfect" into an Ewok pun) and posting the result4.