The music video for "E.T." by Katy Perry ft. Kanye West
It was the intro specifically that scared me iirc; I thought the music and Katy's singing sounded so eerie. I was also pretty unnerved by the alien that turned into Katy. I was so scared of the MV that I wouldn't even listen to the song LOL, but I eventually got over it. "E.T." is one of my favourite Katy Perry songs these days!
This thread actually inspired me to rewatch the video for the first time in years. I definitely understand why younger me was scared of it lol, but I think it's cool now! I especially like Katy's outfits and makeup, though I honestly do still think she's kinda scary LOL