Consider the question. "Miami Vice Theme" is a musical piece composed and performed by Jan Hammer as the theme to the television series Miami Vice. It was first presented as part of the television broadcast of the show in September 1984, was released as a single in 1985, and peaked at the number one spot on the Billboard Hot 100. It was the last instrumental to top the Hot 100 until 2013, when "Harlem Shake" by Baauer reached number one. It also peaked at number five in the UK and number four in Canada. In 1986, it won Grammy Awards for "Best Instrumental Composition" and "Best Pop Instrumental Performance." This song, along with Glenn Frey's number two hit "You Belong to the City", put the Miami Vice soundtrack on the top of the US album chart for 11 weeks in 1985, making it the most successful TV soundtrack of all time until 2006, when Disney Channel's High School Musical beat its record.

Who sings the theme song for miami vice?
 If the answer is 'Jan Hammer'; explain the reasoning:
To answer the question, consider the following: "Miami Vice Theme" is a musical piece composed and performed by Jan Hammer as the theme to the television series Miami Vice.