In the film "Risky Business", what does Tom Cruise use as a microphone when he does his underwear dance?

In the film "Risky Business", Tom Cruise uses a candlestick as a microphone when he decides to dance in his briefs and button-down shirt to the song "Old Time Rock and Roll". The iconic scene of Cruise dancing in his underwear now stands as one of his most memorable that he has ever made.

The film's storyline has a young man ecstatic when his parents leave on vacation for a few days. The high school senior Joel Goodsen (Tom Cruise) then cuts loose with his best friend Miles. After an attempt at securing the services of a prostitute goes slightly awry, Joel hires gorgeous Lana (Rebecca De Mornay) for a night of delight. Stunned by the amount of Lana's "bill" the next morning, Joel grows frantic after he crashes his father's Porsche. In an effort to raise lots of money fast, a desperate Joel turns the house into a brothel.

As critics noted, "Risky Business" is a comedy movie about male adolescent guilt. We are told, "It is a movie that is funny because it deals with subjects that are touchy, fraught with emotional pain, and unless people laugh there's hardly any way they can deal with the subjects." The point is well made that it seems that at some point all teenage boys in our modern times face male adolescent guilt.