"Fidelity" is an alternative pop song from singer-songwriter Regina Spektor released in 2006 in the album Begin to Hope. It marked Spektor's first Billboard 100 hit and is her most successful track to date. Despite a release date of September 25th (its popular music video was released even earlier), the song did not hit the charts until December. The song was re-released in the UK, 12 Mar 2007, as a two-part single.
Spektor wrote the song while watching the movie High Fidelity, which is based on a book by Nick Hornby. .