I......am so bored.....
And wanted to know which princess voices were duplicates. I'm assuming it's something you're curious about as well. And well, here it is:
Ariel and Thumbelina are the same singer and voice actress : Jodi Benson
Jasmine and Mulan are the same singer : Lea Salonga
Belle has only ever played Belle : Paige O'Hara
Princess Odette is the same as Jasmine from Aladin II AND Anastasia : Liz Callaway
The singer for Pochahontas was only Pochahontas (Well, she was also "Princess Ting Ting from Mulan II...but that means nothing)
Aaaand the rest of them are old. So I'm going to assume they were not duplicated/I don't care.