Just some things I think the characters might wear nowadays.
Ariel (The Little Mermaid)
Alice (Alice in Wonderland)
Belle (Beauty and the Beast)
Jane (Tarzan)
Jessica Rabbit (Who Framed Roger Rabbit?)
Kidagakash (Atlantis: The Lost Empire)
Lilo (Lilo and Stitch)
Mulan (Mulan)
Pocahontas (Pocahontas)
Rapunzel (Tangled)
Snow White (Snow White and the Seven Dwarves)
Princess Tiger Lily (Peter Pan)
Wendy (Peter Pan)
Tinkerbell (Peter Pan)
Princess Merida (Brave)
Cruella de Vil (101 Dalmatians)
Yzma (Emperor's New Groove)
Madame Adelaide Bonfamille (The Aristocats)