ET caught up with Cyrus' little sister, Noah, on the red carpet ahead of the show, where she said she was "emotional" for the Disney star's performance.
"I'm so excited for Miley. I'm literally so proud of her. My mom is here, my dad is here, my sister, Brandi, is here. Like, it's just such an exciting night, and I'm getting all emotional for Miley, because I'm really happy for her," she gushed.
"I'm just so excited to be here with her and watch her perform, because she was there for me for my first big awards show," she added. "I'm just so excited to be here and be able to give it back to her."