Los Angeles, July 11 (IANS) Singer Beyonce Knowles is reportedly bouncing back fast just three weeks after giving birth to her twins."Beyonce is recovering from the twins' birth much quicker than she thought she would," a source told hollywoodlife.com."Considering how many difficulties she experienced during the pregnancy, she's bouncing back really fast," the source added.Beyonce and her twins stayed in the hospital a bit longer than usual because the babies were born prematurely. They are all back home and recovering well."Beyonce's energy levels are already getting back to near normal, and her body is looking amazing," the source added.