<p>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 before he goes on stage, his ritual is to pray to god for a good show.</p>