Pippa Middleton missed her older sister Princess Kate 's annual Christmas carol service for the first time since it began – sparking questions about her absence.

RadarOnline.com can reveal she instead appeared at the Abu Dhabi Grand Prix with her husband, James Matthews . Article continues below advertisement

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The 42-year-old socialite was spotted in the UAE on 6 December, keeping a low profile during the day before joining her husband, a former racing driver and Williams Racing board member, in the F1 paddock.

Pippa opted for a classic, understated designer look, wearing a white lace sundress with a matching chunky belt from Lo

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