Abby's announcement of her guest-hosting gig on "The View" brings out the competitiveness between Melissa and Kristie when Mackenzie and Asia battle it out for a featured part in a televised dance performance. Meanwhile, the moms are furious about Abby promoting Maddie to "assistant choreographer" for the group number. Also, Nia struggles to keep up with Asia's energy when they're paired together for a duet.