My 2 year old is addicted to juice

My daughter, who turns two in two weeks is literally addicted to juice, she used to drink water through out the day without to much fuss but her behaviour has progressed over the past few months. If she doesn’t get juice, it is the end of the world… the tantrums are intense. Lately, she’s been waking up during the night just fucking loosing her shit over juice, if she gets water or milk it’s screaming at the top of her lungs and hitting her head off her bed rails, it goes on for hours. I try to stay strong, not cave and give her the juice but I’m 35 weeks pregnant and exhausted. Days and days of being up all night fighting her on this, then she’s miserable all day. Is this normal? My oldest daughter was never like this, she’s 7 and prefers water!