I’m early-mid 20’s and some of my (big & small) favourites are:
Beauty: itssabrinaa, hanxrenee, blendbyhan, jamiegenevieve, staceymariemua (all have beauty YouTube channels, apart from Stacey)
Fashion: connawalker (CEO of House of CB), emilycocklin, mollymaehague, kayleighjcouture, yasminechanel, coppergarden, ambsphillips, lizagulyaewa
Travel: emshelx, rose_in_wonderland, becksplore, bestvacations, gypsea_lust, whatthechic
Fitness: alexandralouise_, courtneydblack, hannaheden_fitness, fashioneatstravel, sw_shabba
Body confidence: _nelly_london, missmalinsara, fatangryblackgirl, anniewadesmith,
Home: pinkpeonyhome, alexsimpsonhome, ellenorjanehome,