I mean to have as a set, not separately.

Well my top 2 when I was little was Jasmine and Ariel.

no doubt

My top 2 were Belle and Ariel when I was little.
Now my top three are Rapunzel, Belle and Ariel :)

My top two are Belle and Ariel. My mom's second and third are also. And my sister's first and third are Ariel and Belle. It seems pretty common at least in my family to have them in top 3 spots :P

Most people generally do have them in the top 2 or 3.

They are very commonly at the top. There doesn't seem to be too much pattern in top two, but I think these two would be in the top the most simply because of how often they are at the top of lists.

Usually. Jasmine and Ariel is also common, but maybe not that much.

Both are my top 2 actually.

or Rapunzel with Belle

Well, they are two of the most popular princesses (along with Mulan) and I see these two on the top two very often, my personal top two are Aurora and Snow White

Objectively speaking, most people on fanpop have Belle and Ariel in their top 3 however, I have to note that what applies to fanpop doesn't always apply to other Disney communities on internet. On Tumblr for instance it's usually Rapunzel and Ariel going together as people's number one and number two.

easy

lol that's my top 2 :D

My top and me and my BFF