Pair of singing dachshunds look like they forget words to song

Have you ever sang full voice when a favorite song comes on the radio and then realize in mid-verse that you don't know the words??! That looks like what might be happening with these two mini dachshunds, Artie (red) and Tasha (black and tan). Watch when they stop and look at each other as if to say, "Uh??? Uh???". Hilarious!!!