#### Answer

The singer Marshall Bruce Mathers III, known professionally as Eminem, appears in the movie "8 Mile" (2002).

#### Work Step by Step

We need to find a counterexample to the statement that no singers appear in movies.
One such example would be the singer known as Eminem.
The singer Marshall Bruce Mathers III, known professionally as Eminem, appears in the movie "8 Mile" (2002).