Arwin's parallel universelilyzer looks very similar to Doctor Who(1963) & (2005)'s TARDIS. A phonebooth that can travel anywhere in time and space, even different dimensions, which is quite similar to Arwin's PU.
Alternate universe Maddie is quite similar to Sharpay Evans from High School Musical, also portrayed by Ashley Tisdale.
The episode's title is a reference to the film "The Sweet Smell of Success".