Human characters in the Chipmunks Adventure have a vaguely Aeon Flux-esque feel?

Someone had pitch-corrected this old movie to make the chipmunks sound like humans, but the bit that caught my eye were these human characters that looked like they came out of Aeon Flux
https://animatedviews.com/wp-content/uploads/2007/02/chip21.jpg

https://www.youtube.com/watch?v=HJPL9xD-CYM

It's a little unnerving to see that style mixed in with the chipmunks. Are there any other animation projects that did anything similar?

Louise Zingarelli was the character designer. I first met her when I worked for Ralph Bakshi on Fire and Ice. She was a huge instpiration and influence. You can see her work in Bakshi's films Hey Good Lookin' and American Pop. Also Starchaser. Very tragically she passed away too soon.

I wonder who else she influenced! There’s a strange out-of-time quality about these in particular...

Interesting tribute from
https://animationresources.org/biography-louise-zingarelli/

At Bagdasarian, we shared an office. I think I was the only person who ever survived sharing an office with Louise. One day, I gave her an incidental character to design. She sat around sipping her coffee and smoking casually. I finally asked her if she was going to get around to doing the drawing, because the deadline was looming. She said, "Here’s a good bet. Get your watch out. I’ll design this character in one minute. You take the sketch to Ross for approval. I betcha two bits he not only approves it, he says he LOVES it." "You’re on!" I said.

So looking at my watch, I called out, "Ready… set… GO!" Louise just sat there smiling at me. I said, "Time has started." She nodded and set her cigarette down… smoothed out her paper… "Twenty seconds." I called out. She sat down and set in to work on the drawing. Her pencil flew over the paper- beautiful sweeping lines, completely original shapes. She finished the character with time to spare and tore it off her pad. I took the sketch next door to Ross’ office. He was on the phone, so I left it on the corner of his desk and went back to Louise. She was smiling like a Cheshire Cat. A couple of minutes later, we heard from the other side of the wall, "FAAAABUUULOOUSS!" Louise casually raised an eyebrow and quietly said, "Pay up."

This is among the coolest things I have learned all year.