Very high pitched, but very fake. That's becasue a voice like that is done in falsetto .
Falsetto is a term used in singing.
It usually has a soft, nasally quality. Think Bee Gees or Frankie Valli. Everyone has a certain point in their voice where they can't sing any higher in their natural voice. This is then note where their voice switches from their normal register to falsetto. Singers call this the passagio or break.