With Nicole Kidman due to give birth in early July, Keith Urban has purchased a surprise present to give to his wife in the delivery room — a $73,000 Cartier Trinity ring! “It’s three rings intertwined, so it’s very symbolic,” the insider says of the popular design, which is set with multi-colored pavé diamonds and is meant to represent the three stages of a relationship: yellow gold for friendship, rose gold for love and white gold for fidelity. “It’s three turned into one and that’s how it will be with Keith, Nicole and the new baby,” notes the insider. Cameron Diaz owns the same ring, as does Katie Holmes, who received hers for Mother’s Day. The Trinity ring was created by Cartier in 1924 and is still one of its most recognized designs today.

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