PHOTO: Beyonce Takes Blue Ivy On Center Stage To Do A Duet In London.

While performing a set during her Mrs. Carter Show World Tour, Beyoncé brought out her 1-year-old daughter Blue Ivy to help perform a duet. She took her baby girl Blue Ivy's hand during "Irreplaceable." Blue Ivy was sporting some protective headphones and a sweet dress. She did this cos she thought her daughter needed company. I love the fact that she is proud of her daughter.