• Tatiana Santo Domingo gets in theme for pal's lavish birthday party in the Swiss Alps

    The hills were alive with royalty and hippies over the weekend. Princess Caroline of Monaco’s daughter Princess Alexandra of Hanover and daughter-in-law Tatiana Santo Domingo flocked to the Swiss Alps to celebrate a mutual friend’s birthday.CLICK FOR FULL GALLERYTatiana and Alexandra enjoyed a sister-in-laws' night out at the fashionable affair Photo: Instagram/@byconcepcionThe sister-in-laws attended the 30th birthday celebration of the late Greek shipping tycoon Stavros Niarchos’ daughter Eugenie Niarchos. Perhaps the highlight of the multi-day festivities took place on Saturday with a sixties soiree held at the luxurious five-star Hotel Kulm St. Moritz. Tatiana, 32, and Alexandra, 16, were