"Fidelity" is a song performed by American singer-songwriter Regina Spektor. It was released in 2006 as part of her fourth studio album, "Begin to Hope." Spektor wrote and composed the song herself. The track has become one of her most popular singles, reaching the top 20 in several countries. Notably, "Fidelity" is recognized for its catchy melody and heartfelt lyrics, exploring themes of love and commitment. It showcases Spektor's unique vocal style and piano-driven sound.