"Lifeline" is the second single from American rock band Papa Roach's fifth album, Metamorphosis, and eleventh released single in total. The song was originally titled "Hanging On", and was changed to "Lifeline" after lead singer Jacoby Shaddix decided to alter the lyrics of the chorus. It was released to iTunes on January 27, 2009 and as a Hot Topic exclusive CD single on February 10. An accompanying music video was released on March 6, 2009. To launch this song in its truest form, the band filmed "Lifeline" live during Crüe Fest.