Crashing Hailey and Kendall Jenner's episode of Carpool Karaoke, the "Nothing Breaks Like A Heart" singer revealed why she used to be so mean to Hailey when they were kids.
“I’ve known you since you were 11,” Hailey told Miley.
Miley then explained to Kendall, “I would be evil to her. She would try to play with us, like me and Alaia (Hailey's older sister), and we would lock her out of the room.”
“My older sister and her used to gang up on me,” Hailey agreed.
“I had to,” Miley said. “It made you who you are, you know? It made you stronger. Now you can always take, like, trolls and sh*t ’cause I was such a troll.”
“Miley was the biggest troll to me. She prepared me for this industry!” Hailey told Kendall.
Later that episode, Miley added that she “needed little sisters to pick on to make me feel like a regular kid.”