Oona Out of Order by Margarita Montimore

It's New Year's Eve 1982, and at the stroke of midnight Oona Lockhart will turn nineteen.  As the countdown begins, Oona faints and awakens thirty-two years in the future in her fifty-one-year-old body.  Greeted by a friendly stranger in a beautiful house she's told is her own, Oona learns that with each passing year she will leap to another age at random.  Who will she be next year? Philantrhropist? Club Kid? World Traveler? Wife to a man she's never met?