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.