Bollywood actress Preity Zinta, who was last seen on TV hosting a chat-show 'Up Close & Personal with PZ', is all set to judge the celebrity dance show 'Nach Baliye 7'. Author Chetan Bhagat will also judge the show along with choreographer Marzi. The show's previous season was judged by actress Shilpa Shetty, choreographer Terence Lewis and director Sajid Khan.