Is this the sort of morning when a song's indelibly stuck in your head? Get it out of your system. Plug in those earphones, boost up the volume, and draw what comes to mind when you're listening to that song; or to a particular artist, or genre. Draw a concert, a psychedelic mood-inducer, a funky display of light and shade! Try to avoid the cliched guitar. ;)
Ideally, we should all be able to figure out which song/artist you were listening to!