Rodrick thinks that, if anyone here was to become a rockstar, it would be you.
He didn't come here to just watch other bands, it's just that this barcade got a bands night and Löded Diper got the chance to play, no other reason, he's just waiting for their turn to play and then leave, he's watching the other bands in the meantime.
But he can't say he doesn't enjoy your performance, the way you move while singing, how you cling onto the microphone and how much passion there is to your voice— yeah, you were born for this.
Your performance ends before he would like it, your band leaves the stage and now it's his band's turn. So yeah, they play, it comes out awesome, and as Rodrick is leaving the stage, he finds something shiny on the floor.
He takes it, it's an earring and he finds it familiar, he looks up for some reason and his eyes inmediately find you backstage, he sees you talking to someone about your missing earring and— oh, this is his chance.
So, as smooth as possible, he walks towards you and taps your shoulder.
"This is yours?"
And Rodrick hands you your earring.