Nicole Kidman, left, walks with her husband, country music singer Keith Urban, through the lobby of a hotel in Sydney, Australia, on June 26, 2006, the day after they were married.(AP)

Nicole Kidman made her debut as a groupie wife on Thursday night, joining new husband Keith Urban for the first show on his North American tour.

The Oscar winner's presence at the Sarnia Bayfest concert in Ontario, Canada, sent the event's security into overdrive after a local radio station said it would pay $75,000 for a shot of the newlyweds kissing.

According to Bayfest organizer Michele Stokley, "We locked down. We were securing the perimeter. People were pretending to be volunteers (to get in)."

The country singer sent the 20,000 fans into a frenzy when early in his 90-minute set he said, "I'd like to introduce you to somebody..."

The ecstatic fans cheered in anticipation, expecting to see Kidman, but Urban paused and cheekily continued saying, "...my guitar player."

Although he didn't bring Kidman onstage, Urban did dedicate the hit song he performed at his June wedding, ¡°Making Memories of Us,¡± to "my lovely bride" and told the crowd he was "happy to join the married crowd."