The 22-year-old singer and dancer injured his leg during Anders Breivik's attack on a Labour youth camp in 2011, putting his nascent pop career on hold.
"The doctors said the leg would never be the same again. I had to learn to walk all over again," he told NRK.
Now however, with the help of physiotherapists and nearly three years of intense training, he can dance as well as he ever could and will take to the stage at the Melodi Grand Prix alongside some of Norway's best hip hop dancers.
"That I can now dance like before is a little miracle I never thought it would be granted to me," he said. "There could have been another Mo who just had to stand still on stage. I owe the doctors and physios who helped me an incredibly big thank you."