Can I duplicate all of my favorite songs on me and my wife's driving playlist on spotify so that my songs play more often on shuffle?
Why did you duplicate only your favorite songs?
I'm not tired of hearing my own songs, I'm also tired of her playing her music too often
Not everybody likes the same music but it is not good to deceive your wife in order to hear your songs. You could just talk it out with her and work things out with her.
I'm going to just ignore this comment.
Why? Your spouse deserves to not be lied to, especially if it means she won't hear her favorite things as much. Do you want to be unfair to someone you love?