Lead guitar is a guitar part which plays melody lines, instrumental fill passages, guitar solos, and occasionally, some riffs within a song structure. The lead is the featured guitar, which usually plays single-note-based lines or double-stops. In rock, heavy metal, blues, jazz, punk, fusion, some pop, and other music styles, lead guitar lines are usually supported by a second guitarist who plays rhythm guitar, which consists of accompaniment chords and riffs, often played with a distortion effect.