Hudson stars alongside co-star Maddie Ziegler in Sia’s upcoming movie, Sister, a musical drama based on a short story written by the singer. It’s also the most extreme transformation ever for the How to Lose a Guy in 10 Days star. After the cut, Hudson admitted there was some initial shock, yet she grew to appreciate her new look. “When it was done, it was like: 'Oh, my head's shaved ... Oh, my god!"