TikToker Rachel O'Cool showed her 1.1 million followers how to do their makeup with current trends ... who says she considers herself a 'cusp' Gen Z and millennial — told Insider.

Dawn, who didn't share her surname, lives in the United Kingdom and was inspired to show her makeup-loving daughter how she used to do her own ... key item wrong by her Gen Z companions.

We like the Koh Gen Do Makeup Sponge ($30 for 2-pack, Amazon) for foundation and the Original Beautyblender Makeup Sponge ($20, Sephora) for mature skin. 3. Mascara ...