Hands at work, Gemeos.

I love pretending to be a Tour Guide. I'm pleased to show London's greatest sightseeing to every friend from Brazil that comes visit me. On Monday I had a big surprise. Strolling around Millenium Bridge, me and my friends could see very talented Brazilian artists "Os Gemeos" graffiting Tate's building. The siblings and many other artists are preparing the gallery for its new exhibition "Street Art", starting today.