নমস্কার i need your help!!

Well, definitely do some exercising beforehand. =) Like just গান গাওয়া what you'd be গান গাওয়া in the show, just warm up and see if আপনি can hit all of the notes. Drink plenty of water, so your voice will be strong and won't fail on you. I'm sure আপনি know to sing from your diaphragm too. ^^ Essentially, just practice and be hydrated! I hope this helps!

fill your lungs with lots of air and keep your throht cleer !! :)

Regulate your breathing carefully, practice lots, drink a lot of water, and don`t talk a lot before গান গাওয়া (it tires out your voice.)