I watched some interview of Anne-Marie(britsh singer) and "What's on your dream rider?"was one of the questions that she was asked. It was a kind of pop-up questions that were not related to each other. Her answer was "on my rider, peanut butter on toast and WKD" which are the things that she likes. And on another interview video, I cannot remember what the quesiton was but her answer was "cheese, peanut butter. It's my rider" so I became curious about what these mean. I want to find the videos that I watched but I couldn't. Sorry that I cannot give you more details. Lastly "I repeat you" is seperate quetion that I want to know what it means. Anyway thank you for your help.

Need some context to answer this question.

A "rider" can be any kind of object to ride something or someone with - basically some vehicle with wheels. The word "dream" as an adjective means that it's the best and ideal one for the person involved with it. So, "what's on your dream rider?" means "what is inside the rider of your dreams?" "I repeat you, it's my rider" is not really proper English. The correct phrase should be : "I repeat, it's my rider" and that seems to be so obvious you probably don't need an explanation for it. Good luck :)