From Marina Abramović and Ulay to Andy Warhol and Jean-Michel Basquiat, when two creative geniuses come together, the results are astounding. The same applies to street art. Across the globe, artists have joined forces to create some of the most mind-boggling works that adorn city streets around the world. Playing off each other’s strengths, these artists use anything from the customary spray paint to pieces of colored fabric to create incredible works of art. Find out if two is really better than one with our list of 20 Awesome Street Art Duos You Should Know.