Singing sensation B Praak, who has belted out hits-after-hits such as 'Ranjha' and 'Mann Bharryaa 2.0' among many others, said that 'Teri Mitti' from the Akshay Kumar-starrer 'Kesari' was one of the toughest numbers he has ever sung. He also added that every time he goes on stage, his ritual is to pray to god for a good show.