Look What I Did is an American post-hardcore band, formed in 2001 in Nashville, Tennessee, USA. The music combines elements of jazz/fusion, hardcore, metal, and progressive pop punk. The band is known for its intense live show, described by Cincinnati CityBeat as a "live act capable of unleashing a scary, uncontrolled intensity bordering on dangerous," and oft-satirical eccentric lyrics.

Look What I Did! is the second compilation album by American rock musician Joe Walsh, released on May 23, 1995. The 2-CD set contains 34 songs from multiple albums spanning from 1968 through 1993, and offers tracks from both Walsh's solo work and when he recorded with the band James Gang.