Viva Las Vegas! When the Lohans arrive in Sin City, Ali is rushed off to record her first single and this aspiring pop star is already feeling the pressure. With everyone counting on her to succeed, Ali starts to stress out and becomes too concerned with what people are thinking. Will she be able to follow in her sister Lindsay's footsteps and become Hollywood's new "It" girl? Or will the reality of showbiz put a damper on her dreams of stardom? Meanwhile, while Ali is in the studio, Cody and Dina take a whirlwind tour of the city. How much trouble can Mama Lohan get into in Sin City? Just watch and see.

With Jeremy now out of the picture, Dina needs to scramble to find another song for Ali to record. But time is running out and with only four days to finish up her demo track, everyone is feeling the pressure. Meanwhile, Cody cooks up a plan to get his mother back into the spotlight and tricks her into showing off her old dance moves during a show at the Palms Hotel. Can she still work it like she used to? Or will she end up making a fool of herself in public? Finally, it's time for the Lohan clan to say goodbye to Vegas and return home to Long Island. Join the family as they celebrate Ali's music accomplishments with a special farewell dinner with the Maloofs. And just when they thought things were winding down, a Hollywood director is interested in casting Ali for his horror movie remake. Will this be the big break she's been waiting for?