Ariana Grande visited Universal Studios' American Horror Story Halloween Horror Nights haunted house maze with Ellen DeGeneres' longtime producer Andy Lassner on the Monday, October 31, episode of The Ellen DeGeneres Show.

"I've been waiting for this moment for a long, long time," DeGeneres, 58, prefaced the hilarious annual video, which you can check out in the clip above!

As Grande, 23, and Lassner, 49, entered the maze, they tried to calm each other down with comforting words of encouragement. "It's fine. It's not bad," she said.

Seconds later, American Horror Story: Murder House's creepy Rubber Man character reached out to grab the duo, frightening the "Into You" singer so badly that she fell to the floor. "We got this!" DeGeneres' producer quipped as he helped Grande off the ground.

As Grande regathered herself and covered her ears, another terrifying creature popped out from a nearby window. "Go in! Go in! Close it!" Lassner demanded, as the pop star said, "No, no, no. No, thank you! No, thank you!"

The twosome then entered an abandoned old bathroom, where Murder House monster Piggy Man jumped out from behind a shower curtain, swinging a bloody butcher knife at Grande.

"Is this fun at all for you? It's my nightmare," Lassner asked the entertainer, who replied, somewhat unconvincingly, "Yeah, it's just fake."

The Addiction Demon from American Horror Story: Hotel then shot up from inside of a mattress, prompting the TV producer to scream, "Get the f--k in bed!"

Moments later, a handful of scary characters appeared all at once. Startled, Lassner fell to the ground, and Grande pondered aloud, "Where the f--k is Andy, man? Let's go!"

As the pals exited the haunted house, the "Dangerous Woman" songstress joked, "It wasn't bad," before pointing to the haunted attraction and adding, "Somewhere in there is my heart."

Watch the hilarious video below!

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