This came as a complete surprise to me: Lady Gaga did an ad for Haus Labs called "We Love Foundation," and gets messy with the product.

I wasn't even remotely looking for the ad; I was watching a Star Wars "what if" video, and this was what popped up during the commercials.

Just wanted to let you know.

Enjoy

https://www.youtube.com/watch?v=i99qpfGJvmw

Wow, that's amazing mainstream WAM, right there. Gaga has always been wonderfully weird; the fact that she nailed this commercial from our point of view makes total sense to me. What a lady.

Oh wow fully arched back, "foundation" self poured directly on her face. I am even further convinced in my own idea that someone could talk her into a full blown wam session. I also believe this about katy perry

Amazing!!! Ah gaga is great like

I have a feeling this isn't her first rodeo...

You know, I was suspicious this wouldn't quite be my thing when she starts out by just playing around with it a little bit, but then she dumps it straight on her face and WHOO was I wrong.

She did work with Tony Bennett...

Nah

Funny that you said that... (look up the recent Katy Perry post)

Oh boy I gotta see this

She was "pied" in a star is born as well

Lady Gaga and Katy Perry definitely a wammer!

Before assuming any celebrity is into WAM, consider there are multiple possible levels:

Doesn't mind getting messy for visual effect.
Actively enjoys getting messy but in a purely platonic, fun way.
Actively gets a sexual kick out of getting messy and does it for sexual pleasure.

I'm thinking that Lady Gaga and Ms Perry are definitely in the first category, and might be in the second too. But unless one of them reveals it in an autobiography, we're unlikely to ever know if the third applies. It is a nice dream though, that someone rich, famous, and gorgeous, gets off on sinking into a bath of mud. But until and unless someone actually outs themselves as an actual wammer, it should stay a (very pleasant) fantasy.