YouTube has seemingly fallen prey to hackers even as a number of high-profile music videos have been defaced, some deleted, including Luis Fonsi and Daddy Yankee’s Despacito. Despacito, in case you’ve been living under a rock, is the most-viewed YouTube video of all time. Earlier in the day, the video’s thumb image was altered and replaced with a masked gang holding guns, the Verge reports. The description of the video was changed as well, and as of writing this report, Despacito — at least the official video — is untraceable, the report adds.

At the heart of it all lie hackers calling themselves Prosox and Kuroi’sh, and they’ve apparently hacked the video sharing platform “just for fun.”

Despacito isn’t the only video that has apparently been affected. Lots of other popular music videos have also been defaced. But it appears as if videos posted by Vevo accounts are the worst affected. The list includes videos from Chris Brown to DJ Snake, from Shakira to Selena Gomez, from Katy Perry to Taylor Swift, so on and so forth. Some of these affected videos, are in fact, still online.