"Lost Without Each Other" is a song written and performed by American pop-rock band Hanson. It was released as the second single from the band's third studio album, Underneath (2004), on August 9, 2004; in Australia, it was issued as a double A-side with "Strong Enough to Break" in April 2005. The song peaked at number 39 on the UK Singles Chart but failed to obtain any significant success elsewhere.