Newlywed Kelly Clarkson is modelling her first Christmas as a married woman after the disaster-prone Griswold family's festive celebrations in National Lampoon's Christmas Vacation.

The Since U Been Gone hitmaker wed Brandon Blackstock in October (13) and just weeks later, announced she was pregnant with her first child, and now that she's celebrating her first holiday with her husband and his two kids from a previous relationship, Clarkson is keen on starting traditions with her new family.

Clarkson explains, "We are starting a Blackstock family Christmas weekend in honour of the Griswolds. Complete with an ugly sweater family Christmas dinner competition!"