Popular indie singer-songwriter Prateek Kuhad performed at the mehendi ceremony of Ranbir Kapoor-Alia Bhatt wedding, which took place at Kapoor’s Mumbai residence, Vastu, on Wednesday night. Sources, who were present at the ceremony, inform us that the 32-year-old singer performed several tracks including his most popular hit Kasoor, in a set that lasted, for almost an hour. Singer-songwriter Prateek Kuhad …