I can't wait to see her dance (or dancing)?
Do people say "I can't wait to see her dancing" at all?
If so, what is the difference ?

Appreciate your help, thanks :)

Question

I can't wait to see her dance (or dancing)?
Do people say "I can't wait to see her dancing" at all? 
If so, what is the difference ?

Appreciate your help, thanks :)

Answer

Hello,

They both mean the same, while using a noun in the first sentence and a verb ( or a noun ) in the second one .
"Dancing" could be a noun as well. It is a verbal noun formed by adding "ing" to the verb 'dance'  
Danc(e) + ING 
Danc I ng

" I can't wait to see her dancing".

means you can't wait to see her act of dancing, to see her perform the dance . The sentence uses a verb ( or a noun ) here.

" I can't wait to see her dance"
You can't wait to see the performance of dance itself. It is using the noun "dance".

Answer

it means the same.Just the minor difference in tense,

Não perca a oportunidade de aprender uma língua no conforto da sua casa. Navegue pela nossa seleção de professores de línguas experientes e inscreva-se na sua primeira aula agora mesmo!