For once, it's what Lady Gaga isn't wearing that's causing a stir!

The singer doffs her top in a sea of half-naked men in the nearly 9-minute video for her latest single, "Alejandro."

But in typical Gaga fashion, her other outfits are over the top -- including a leather Joan of Arc-inspired cloak and a rifle-toting bra!

Back in March, WWD reported that Gaga had selected fashion photographer Steven Klein -- who shot Brad Pitt and Angelina Jolie's infamous 2005 W magazine cover -- to helm the music video.

Other shocking moments in the video? Split shots show Gaga dressed as a nun and swallowing a rosary before writhing around in bed with semi-nude men in high heels.

Tell Us: What do you think of Lady Gaga's wacky video?