Keith Urban's Big Birthday Sing-A-Long for Nicole Kidman
06/22/2008 AT 12:00 PM EDT
After Keith Urban sang "Who Wouldn't Wanna Be Me" for pregnant wife Nicole Kidman, the country star announced to the Chicago Soldier Field crowd Saturday night that she just had a birthday the day before.
"So it would be nice to have 50,000 people sing 'Happy Birthday' to her," he said – and brought Kidman on stage for a stadium-sized sing-a-long for the actress, who turned 41 on Friday.
A surprised and glowing Kidman, in a long flowing black floral tank top dress, blew the audience a kiss and returned backstage when the song finished. The couple are awaiting the birth of their first child, due any day.