Keith Urban's Special Birthday Wish to Nicole

posted by Shelby Mitchell -

KEITH URBAN convinced his audience to help sing "Happy Birthday" to his wife NICOLE KIDMAN . . . who turned 51 yesterday.

Nicole posted the clip on her Instagram and wrote, "What a gift.  My husband and everyone at [Country USA Festival] in Oshkosh, Wisconsin singing me Happy Birthday."

What a gift - my husband and everyone at @officialcusa Oshkosh WI singing me Happy Birthday!!!!!!

A post shared by Nicole Kidman (@nicolekidman) on



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