Finnish illustrator Jaakko Seppälä has undertaken quite the task. He chose ten different iconic characters and drew the familiar faces in the styles of ten different famous cartoonists. He really had to flex his skills to capture the varying techniques and approaches, and I think he was successful at making each drawing stand on its own.
According to Gizmodo, the characters from top to bottom are: Asterix, Calvin, Donald Duck, Captain Haddock, Batman, Heimo Vesa, Corto Maltese, Moomintroll, Garfield, and Lucy. The cartoonists are Albert Uderzo, Bill Watterson, Carl Barks, Hergé, Neal Adams, Pertti Jarla, Hugo Pratt, Tove Jansson, Jim Davis, and Charles Schulz.
Be sure to click the above image to enlarge it so you can see all the details.