My calm and happy toddler has turned into a diva with attitude overnight!!

Has anyone else experienced this or going through this right now? My daughter is generally very calm, happy and patient with the odd tantrum here and there which is normal. But lately she has developed such an attitude saying no to everything, throwing hitting biting screaming just not corporating with anything 😂 this happened overnight and honestly it has been so hard to deal with. I am being patient with her but nothing seems to be working. We usually do kind hands, smell the flowers/blow the candles which always worked for us but not anymore. Help!!!!