Shadow art is a unique form of sculptural art where the 2D shadows cast by a 3D sculpture are essential for the artistic effect.

Syrian artist Muhammad Ejleh has been spending his personal time while studying architectural design to work on his 3D drawings. Using only a sketchpad and pencils, the 20-year-old-student manages to make his characters and architecture pop out of the page.

Recording artist Lady Gaga performs during a stop of The Monster Ball Tour at the MGM Grand Garden Arena March 25, 2011 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

Actor Lorenzo Lamas and girlfriend Shawna Craig arrives at the showcase unveiling of “Cosmic Harley” a one of a kind $1,000,000 Harley Davidson designed by artist Jack Armstrong at the Harley Davidson showrooms on October 21, 2010 in Marina del Rey, California. (Photo by Frazer Harrison/Getty Images)

French artist Charlotte Caron makes very interesting paintings. For the works, a combination of photography and painting, she paints animal heads looking like some sort of masks over the faces of photo-portraits that she takes herself.