Actress Preity Zinta, who is currently busy judging the seventh season of dance-based reality show 'Nach Baliye', got emotional after watching the performance of a contestant. The 40-year-old actress got emotional after Nandish Sandhu and Rashami Desai's act on the title song of 'Hamari Adhuri Kahani'. "Preity has always seen things as glass half full. She is positive and full of energy. This is the first time she got emotional while watching a performance, but then she composed herself and went about judging the show," a source said in a statement. The seventh season of 'Nach Baliye' is also judged by author Chetan Bhagat and choreographer Marzi Pestonji. The episode from the Star Plus show will be aired on July 12.