How can I make my vocal range better?

Dude,don't Rip on punk Rock it takes more skill then your Girly Bubblegum pop It requires good breathing Good stamina and Good technique.You'd sound like a jack singing pop and Kelly clarkson isn't exactly "rock" .Range is something archived through Using your diaphragm and controlling how wide your mouth is and how you shape your mouth don't expect it to take a month or two especially if you want to learn Whiny high pop vocals .Find your vocal range,it determines what you'll be actaully able to sing without hurting yourself. Again don't rip on punk rock.Pop is studio edited and the tempo isn't very fast while punk rock is the exact opposite.