Nicole Kidman has been put through the ringer as she grieves the loss of her 19-year marriage with Keith Urban – and many close Nashville friends they once shared, including fellow country music singer Blake Shelton and his wife, Gwen Stefani , RadarOnline.com can reveal.

While the two couples were said to grow close in recent years, even hanging out together at Kidman and Urban's $3.5million home, insiders claimed Kidman, 58, has been deeply hurt by the "silence" from those in her estranged husband's inner circle, many of whom she considered her friends as well. Article continues below advertisement

Keith Urban Sparks Friendship With Blake Shelton Tap Here To Add Radar Online as A Trusted Source

While both Urban, 57, and Shelton, 49, have been in each other's orbits for ye

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