The lead singer with US band Boston has been found dead at his home.
Brad Delp, who was 55, sang the vocals on a string of mainstream rock hits from the 1970s, including More Than a Feeling and Long Time.
Police in New Hampshire confirmed they discovered Delp's body after receiving a call to his home on Friday afternoon.
Lt William Baldwin said there was no indication anyone else was involved in the death, with the cause still to be determined by the medical examiner.
The band's website has been taken down and replaced with the simple message: "We just lost the nicest guy in rock and roll."
Delp joined the band in the early '70s after meeting guitarist, songwriter and producer Tom Scholz, with the group later signing with the Epic label.
Their first album, the eponymous Boston, was a huge success and the band picked up a loyal fanbase as they toured extensively.
But Scholz had a reputation for meticulous production of albums and the slow progress made on successive releases effectively tore the band apart.
Delp quietly left the group in 1991 to work with former member Barry Goudreau, and was replaced on lead vocals by Fran Cosmo on the album Walk On. Delp did rejoin the group for the album's tour, sharing the vocal duties with Cosmo.
A new Boston album, with Delp back as sole lead singer, was known to have been in the making but no release date was ever given.