Keith Harring.

As I mentioned, I'm always online. If not, then I'm sleep.
So I was over google looking for art and I saw some funky & groovy arts by Keith Harring.
It also seems like Madonna used those graphics on her last tour "Sticky & Sweet" in her famous song "Into the Groove".
I wikipedia-d Keith Harring and it says that he was close with Madonna in her early years. Keith Harring died from AIDS in the late 80's. Madonna used his art as a tribute to him.