The Mars rover engineering team works on Mars time. A martian day, also called a “sol”, is 40 minutes longer than an Earth day. Each martian morning as the rover wakes up they play a song related to the events of the upcoming sol. Occasionally a second or third song is played during the sol in addition to the wakeup song. This is a tradition from the manned space program. Unfortunately robotic probes are not yet capable of feeling inspiration from music, but Mission Control is.
This page lists all the songs I know about, and the explanations. The frequently-repeated phrase “touch and go” refers to deploying the arm to examine dirt or rocks (touch) followed by driving away (go).