According to Contact Music :
“Superstar JENNIFER LOPEZ stunned guests at husband MARC ANTHONY’s surprise birthday party last week (16SEP04), by refusing to sing to her beau.
The JENNY FROM THE BLOCK star was asked to take to the stage to serenade the Latin singer, but declined claiming that she had not been given enough time to prepare.”
“An eyewitness tells PAGESIX.COM, “Marc ended up singing at his own birthday. You’ll never see J.Lo un-plugged.” ‘