The 32-year-old singer flew across the arena on a harness, landing right in front of her and said that she had a very special young lady here with her and asked her to tell the crowd her name.
The 'Single Ladies' hitmaker then asked Sophie to sing her single 'To the left, to the left' along with her, Radar Online reported.
According to Perth Now, it happened place courtesy Sophie's elder sister, Ellie, who claimed that her sister could never go to a concert due to logistical reasons.
She added that with everything that Sophie has been through, she was still able to raise over 1000 dollars for people suffering from multiple sclerosis at the Runamuck and that was all put in a video.
Ellie later sent the video to Beyonce's manager.
--ANI (Posted on 11-11-2013)