Keith Urban became emotional while singing about an ex “moving on” amid rumors his ex-wife, Nicole Kidman, is dating a new man.

Urban fought back tears while performing his song “We Go Back” at the Hard Rock Hotel & Casino in Atlantic City on Friday night, according to a video obtained by the Daily Mail.

“This song is about a guy and a girl growing up in a small town,” Urban told the crowd, adding, “They were the first of their friends to fall in love. They had a good thing going, until the guy screwed it up. I will do that.”

The “Somebody Like You” singer explained that “years and years go by” before they finally reunited.

“This guy can’t…

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