There is something poetic about Beyonce lip-syncing the National Anthem during the Inauguration

[Fmedges]

The Marine Band recruits experienced musicians; members are selected through a rigorous audition procedure and must satisfy additional security and physical requirements to be eligible. Selected band members serve under a four-year contract as active dutyenlisted Marines and are subject to the Uniform Code of Military Justice and physical standards. They are the only members of the United States Armed Forces not required to undergo recruit training and do not perform combat missions. Also, they are not assigned to any unit other than the Marine Band.
The band members start at the rank of Staff Sergeant, and wear rank insignia with a lyre replacing the normal crossed rifles. Commissioned officers are drawn from the band, although Drum Majors are career Marines and are selected from Fleet Marine Force bands, as they are responsible for the military development of the band's members.

As far as I'm concerned, signing a contract and just showing up while getting E-6 pay while in a non combat band unit, doesn't make a Marine.