Hailie shared a few snaps of herself dressed for Halloween and she was sporting Grande's signature long ponytail, long black boots, and a blow pop.
For her caption, she left 7 engagement rings that helped reveal who she was dressed as.
Ariana Sends Love
Grande was flattered by the 23-year-old's costume and sent her some love.
Ari left a black heart and the same ring emoji.
Hailie's fans were quick to react to her outfit.
"Killing the Ariana look!!" One fan said while another wrote, "How to: dressing as Ariana Grande anda [sic] actually looking better than her."
She Sparked Engagement Rumors
Her caption was not without controversy. Some fans did not interpret the ring emojis in the same way and thought that she was announcing her engagement.
"Please don't tell me you are engaged now," a concerted follower commented.
"I thought for a second you was engaged with the rings!" Another fan exclaimed, "love this look!"
The engagement scare continued to rock her follower's foundation.
"Girl my intent is slow right now so the pictures weren't loading so all I saw was them ring emojis ...oh child I thought you were getting married I almost had a stroke," a dramatic fan wrote.
She Got Trolled By MGK Fans
Unfortunately, her post could not escape the trolls.
"I'd put a ring on it," one troll stated before bringing up MGK. "I'm an mgk fan and i doubt you like those types of people."
Another troll asked Hailie, "What are you and MGK up to tonight?"
Hailie looked great and now that Ariana approved, her Halloween is going to be awesome.