Kirstie Summer is a character that made an briefly appearance in The One during a party. She is a celebrity.
Kirstie was a guest of Celeste Newsome at a Tea Party at the Palace along with Tessa Tamble. According to America Singer, Kirstie is "mostly known for her outlandish concerts". However, she doesn't seem to mind wearing unique clothing either, because she wore something similar to a costume that she might wear performing that was painted leather. At the party, she had been drinking alcohol. Apparently, it could be known by the smell if you got too close to her.