Celebrities have donated doodles for USA National Doodle Day, part of NF (Neurofibromatosis) month.
Jason Alexander, Tony Hawk, Julia Louis-Dreyfus, Tim Allen, Amy Poehler, Martin Sheen, Gillian Anderson, Carrie Underwood and a host of stars have put pen to paper in an art effort to raise awareness and funds.
Check out the doodles and celebrate USA National Doodle Day on 13 May.