Where Bonnie got her outfit for her "ice skating date"? It was not at all what she had been wearing before. While picking out clothes before, she was wearing a matching Christmas sweater and while walking outside she was wearing a long RED coat with a WHITE scarf, gloves, hat and bag. While she is skating she is wearing a short skirt with a short red coat and a red scarf and hat.
In the ice skating scene, despite wearing skates, the actors can clearly be seen taking steps rather skating strides, meaning this scene was likely filmed not on ice but on a non-slippery surface meant to imitate the appearance of ice.
In the Karaoke scenes you can clearly see that the Microphones they use are Wired types (appears to be Shure SM58) that don't have their cables attached instead of actual Wireless mics.