The original version was done in the eighties by Tears For Fears. If you google "Mad World" it´s the first hit, the second one being Gary Jules, which might be the (cover) version you have in mind.
The original version was done in the eighties by Tears For Fears. If you google "Mad World" it´s the first hit, the second one being Gary Jules, which might be the (cover) version you have in mind.