Nicole Kidman Bares Bikini

At least the bottom half!

It was girl-bonding time for Nicole Kidman as spent Friday afternoon yachting and swimming with some friends while vacationing in St. Barth in the French West Indies.

Noticeably missing was hubby Keith Urban, who gave a very spontaneous show last night to members of Keith‘s official fan club, Monkeyville, at Nashville nightspot “City Hall.”

Nicole‘s new movie role involves a load of bull. She recently told UK’s The Daily Mail that she learned how to round up cattle and castrate bulls in preparation for her latest movie role in Baz Luhrmann‘s World War II epic, Australia.

In the film, Nicole plays an English aristocrat who travels to Australia after inheriting a cattle station.

Says Nicole, 39, of her newly acquired skills, “I don’t know if I’ll have to do that, but it’s best to be prepared. In seven weeks, I’ll be riding a horse and chasing young bulls.”

Nicole‘s new film His Dark Materials: The Golden Compass opens Dec. 7 and co-stars Casino Royale‘s Daniel Craig and Eva Green.

UPDATE :: Keith Urban was, in fact, spotted cuddling at St. Barth with Nicole on Saturday. The pair most definitely seem to be staying strong.