Beyonce took the world by surprise on Friday when she released her fifth studio self-titled album ("Beyonce") with 14 tracks and 17 videos at midnight on Itunes with no prior warning ever leaking out.

It just so happen that Queen Bey is still on her Mrs. Carter Show World Tour, so at her stop on Friday in Chicago at the United Center, she treated her fans with a live debut "XO," the 10th track on Beyonce.

Man, I wish I could had been there. BUT I was traveling back to attend the B96 Radio Pepsi JingleBash at Allstate Arena.

 According to source, Beyonce told the crowd "I'm gonna sing you a song which is a brand-new song." she said as she introduced the number. "It haven't even been out for 24 hours. I'm gonna sing this for y'all because it was written for y'all." She then invited the crowd to join her in a call and response on the song. "This is the first time, something I'll never forget," she said.

Billboard reports, Beyonce will be releasing "XO" as the third single for the new album, following "Blow" and the Jay-Z featured "Drunk in Love."