However, the footage shows that Millie still has her makeup on - especially her eye makeup - when the routine is completed.
When she uses the Get That Grime Face Scrub to wash her face, things take a weird turn.
"I'm really excited to use it because I do still feel some of the makeup on and I know that this will fix it," she explained.
Millie actually moves the bottle away from the camera when she supposedly squirts out the product, and while you can hear her scrubbing her face, it doesn't look like she has anything on her hands.
"This is honestly just to prevent me from getting a pimple tomorrow," she says. "I don't usually wear makeup if I'm not working, but today I'm working, so you've got to look somewhat presentable."
Rubbing her hands together you can see there is literally no product there.
Millie then stops recording before washing her face. When the video starts again, her skin is dry but her eye makeup is still perfectly in place.
Next is her demonstration using the Clean Magic Face Wash, claiming that "You immediately feel better" after using it.
Once again no product is seen on her hands or face, and she stops the filming again to wash it off.
The video has since been removed from Instagram, according to BuzzFeed News, but it is still on YouTube.
"The mist is the only thing she actually used! This girl basically just spent [two] minutes rubbing her face with her bare hands," one comment read.
"Notice how she never let us see the product on her hands and had to tell us 'okay, I'm using it now' for each product?" said another.
"Her skin never changed either when she 'applied' each product. There was no visible product on the face. There was no shine from being damp or from a clear product being applied," another commenter wrote.
"And is everyone just going to ignore that she still has eye makeup on? I mean, s**t, if you're going to pretend that you use your own products to get the results that others are actually giving you (which is sketch do begin with) at least be willing to bite the bullet and use them once in front of us," more comments read.
Other fans rightfully questioned why she used the face mist first only to 'wash' it off.
"I am convinced [you] are selling air in cute purple bottles," questioned a fan.
Millie isn't the first celebrity to come under fire for seemingly 'faking' a tutorial.
Shay Mitchell and Kendall Jenner are two stars who made very questionable sponsored videos.
Last September Shay uploaded a Bioré sponsored video on her Snapchat as she was an ambassador, appearing to use cleansing micellar water on her eyes, however, her heavy liner and mascara didn't move an inch.
She also used a Snappy filter over her face for the whole video. Weird.
As for Kendall, she was slammed in June for her Proactiv ad, who she is an ambassador for.
The model appears to wash her face for a total of 0.5 seconds.
"Who washes their face that quick tho? What's it cleaning," a fan wrote on the video. The video was dubbed "useless".
Millie has yet to respond to the backlash.