Who does princess daisy like in Mario brothers?

Princess Daisy from the famous Mario Bros. franchise is said to like Mario's twin brother, Luigi. Though there is never been direct proof, in Mario Kart Wii, in Daisy Circuit, there are two statues of Luigi and Daisy holding each other. Also, I don't remember which game, but there is a game (I believe a sports game) where she refers to Luigi as "honey".