When Lola gets injured, and cannot compete in the "Little Miss Prim & Perfect" pageant, Lincoln trains Lana to take her place without her knowledge.
Lincoln is training Lola to compete in the "Little Miss Prim & Perfect" beauty pageant, whose grand prize is two season passes to Dairyland. Unfortunately, while training, Lola slips on a discarded can of perfume, and breaks her leg and hand. Lincoln is devastated, as this means he will have to forget the Dairyland passes, until he realizes that since Lana is Lola's twin, and he can make her look like Lola, to place at the pageant. However, they can't let Lola know, as they don't want to suffer her extreme wrath.
For the next few days, Lincoln trains Lana to look and act girly, following a book by pageant expert Gil DeLily, whilst trying to get her to resist her urges to fix things, and perform gross acts. On the day of the pageant, Lincoln sees that it's going to be televised on the Princess Channel, and he expresses relief that the house doesn't carry it. However, Dad has just bought the Princess Channel for Lola, and she is furious when she sees that her twin is posing as her, prompting her to limp over to the pageant hall.
During the show, Lana displays some of her un-girlish traits while performing, much to both her embarrassment, and her brother's frustration. After Lincoln blasts her for not letting go of her habits, and potentially costing them the Dairyland tickets, Lana admits to him that she can't help it, and that she can't be like the other girls at the pageant. Feeling guilty about his selfish actions, Lincoln apologizes to Lana, and allows her to be herself, even if it means not winning the tickets.
As Lana goes onstage, and does an act involving armpit farting, Lola shows up backstage, and angrily confronts Lincoln about putting her pageant career on the line. However, the judges and audience respond enthusiastically to Lana's performance, and she wins the pageant. Impressed, Lola allows her twin to keep the tiara she won, and lets her and her brother go to Dairyland, leading to Lincoln and Lana being excited. The episode ends with Lincoln and Lana riding the park's new "Milk Shaker" roller coaster, which causes Lincoln to throw up, and get covered in his own vomit, much to Lincoln's disgust, and Lana's amusement.
Irony: At the end of the episode, Lincoln says to the viewers to keep their mouth closed while riding the Milk Shaker, but he gets hit with Lana's barf with his mouth open.
Toads and Tiaras - The title is a parody of the TV reality series Toddlers & Tiaras.
SpongeBob SquarePants - When Lola is a devil, and when Lana is an angel, their backgrounds are similar to SpongeBob's portrayal as an angel, and Squidward's portrayal as a devil, in the SpongeBob SquarePants episode, "Just One Bite".
The cherubs that appear when the Dairyland tickets are mentioned are based on comic strip characters:
Peanuts - Charlie Brown appeared as one of the cherubs.