This is the 10264th most frequent Polish word.
celebrytce
"Celebrytce" means "to a female celebrity" in English.
This usage of 'celebrytce' is the dative form of the word 'celebrytka' which means 'a female celebrity'. It is used here to indicate that the action (admiring the outfit) relates to the celebrity.
Podziwialiśmy strój, który celebrytce doskonale pasował.
We admired the outfit that suited the celebrity well.
Again, 'celebrytce' is in the dative case, indicating the recipient of the present (the female celebrity).
Kupiliśmy prezent celebrytce na urodziny.
We bought the celebrity a present for her birthday.
Here, 'z celebrytce' seems incorrect; to properly indicate talking with the celebrity, the phrase should be 'z celebrytką'. The correct usage involves the instrumental case for such context.