1.In the first scene it is obvious that they are very attracted to one another. Eddy/McDonald make a wonderful pair, and you can see the attraction in both scenes. They are fighting it in the canoe, and while she is in the little dive singing, you can see the flirtatious eyes and smiles coming from both of them.
2.Eddy/McDonald make a wonderful pair. Like Astaire/Rodgers, they are a match made in heaven. I really like that about films from that era; once a duo was formed, they stuck together through so many films. You will notice this with Dick Powell, Ruby Keeler and Joan B