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Singh's label, Rainush, was launched soon after he had success in a television competition. He won the reality-based competition "Let's Design" in 2011. As with all the other competitors in the series, he had to work with cotton to design an haute couture collection. In 2010 he won the Most Creative and Innovative Design Collection Award in the NIFT Graduation Fashion show. He also won an award for the best "prêt-à-porter" garment in the first season of "Let's Design", 2009.