The most emotional part of the video comes within the first moments of seconds when we hear her voice emotionally talking about her very public relationship. "You make me feel crazy, you make feel like it’s my fault," she's heard saying as she cries. "I was in pain.”
It was a very vulnerable moment and the 22-year-old singer reveals how they captured something so raw and real.
"They taped the mic underneath the table when I was shooting the video," she explains, about to cry all over again. "And I went in and I went into the room by myself, and I looked at the actual mirror in the music video, and I had a conversation [with] myself to every question I had in my mind in that moment: ‘Wow, this feeling changes everything and you can’t help it.'”
As for how Bieber, 20, responded to the video, she tells Seacrest that he thought it was beautiful. "I think it was really hard," she says of his reaction, before adding jokingly, "I think he was a little jealous of the video guy at first."
Commenting on the meaning behind "The Heart Wants What It Wants", Gomez admits that both her and Bieber had an issue with "identity" this year. As she's admitted in the past, she's still trying to discover who she is, and says this was one of the reasons the two have had such a back and forth romance.
"I was trying to figure out what I'm doing, and that was the first time I was constantly being kicked down for doing that,'" she explains. "And yeah, I made some decisions that weren't great as well, and so did [Justin] and that's why we went through all that to only make us better."
Even after such a tumultuous romance, Gomez tells Seacrest she's still in Bieber's corner. "I support him. I think I always will. I'm upset when he's upset, I'm happy when he's happy. I don't want anything bad ever happen to him. It hurts me. That's all."
While she's still on her journey to self discovery, Gomez says she's not alone in this struggle. "Honestly, music is an expression, and if you will be that voice for these girls, there are some people that feel this. This is universal."
The former Disney star also shared the video and song with her famous friend Taylor Swift -- who's notorious for singing about her own love life -- to get her take. "
"She loved it," Gomez recalls. "She had headphones in, and she watched the video, and then she just looked at me, then she looked back, and then played it three times over and over again. And I'm like, 'I want to know,' and she was like, 'Oh my God. This is amazing. I'm so excited for you.'"