This is one of my favorite eps of the series. Throughout it, Ethel is constantly referred to as "Ethel Mae Potter". At least by the people of her hometown. However, in earlier eps, her middle name was given as "Louise" ("Lucy and Ethel Buy the Same Dress") and in yet another ep it's "Roberta".

Look at the position of Ethel's hands in the group photo Billy Hackett took. When the picture is taken, her fingers are curled and only Lucy is touching one of Ethel's arms. When the picture is printed in the newspaper, Ethel's fingers are in more of a prayer position and she has a hand on each of her arms.

I love the comedy bits Lucy, Ricky and Fred perform behind Ethel as she sings. That really makes the ep for me.