Your POV
As Fierce Arrows came backstage, I walked up to Naomi and KC. "Hey. You guys did a great job!" They smiled at me. "Thanks! The crowd got really passionate about it..." "Yeah, I wonder what happened...?" That basically tells me that those two clearly had no idea what happened to the other bands. So that means that Lacey and Declan had something to do with it.
Shadow's POV
I saw (Y/N) talking to Naomi and KC. I guessed it was about what happened during their performance. She looked at me and shook her head, which means that they didn't know what was going on. I personally think that Lacey and Declan know about it.
"Naomi! KC! Why are you talking to them?!" Speak of the devil and her demon boyfriend. We turned to see Lacey and Declan. "Chillax, guys. They're our friends." "Yeah. Why not have a friendly competition?" The couple let out a dry chuckle. "Friendly competition? Ha. When we compete against Sonic Boom, there is no friendly competition. Or any competition!"
They laughed out loud. We glared at them. "You two did something... We wanna know. Now." "Aww, what makes you think that?" "The way those bands were acting! That's what!" "Where's the fun in telling you what happened?" Those two are impossible! "Well, we'll see you later!" They walked off, dragging Naomi and KC behind them. So much for a friendly competition...