Keith Urban and Carrie Underwood's 'Love, Pain and the whole crazy Carnival Ride' Tour ended last week with big stars and big tears. At last Thursday's show in Atlanta, an emotional Underwood could barely get through her hit song, 'Don't Forget to Remember Me.' The blond beauty broke down in tears in the middle of the second chorus. The lyrics of the song, about a girl who moves away from her family, apparently hit a little too close to home.

"Carrie just got overwhelmed in the moment with the song," Underwood's rep told PEOPLE magazine. "When she reflects on what has happened to her in the past few years since 'Idol,' coupled with the crowds' reaction to that song, she just reacts in performance."

The Urban-Underwood tour made its final stop in Lexington, Ky. on Saturday with a very special (and very pregnant) guest in the audience, Urban's wife Nicole Kidman. Urban revealed to the audience that the show was being filmed for an upcoming live DVD.