Wicked

Ariana Grande is serving a whole lotta gratitude as "Wicked" finally hits theaters -- gushing over fans and even poking fun at her press tour emotions, saying, "Who’s surprised?"

The singer got real with fans on IG Stories Friday ... flipping the script on their gratitude, saying that while they thank her for changing their lives, she says they’ve massively impacted hers, too -- helping her in countless ways over the years.

Ariana made it clear she wouldn’t be where she is today without them, saying her supporters have held her hand and healed her heart over the past decade.