Question: Brad Delp and Neil Hannon, have which occupations in common?

Context paragraphs:
The Divine Comedy (band): The Divine Comedy are an orchestral pop band from Northern Ireland formed in 1989 and fronted by Neil Hannon.  Hannon has been the only constant member of the group, playing, in some instances, all of the non-orchestral instrumentation besides drums.  To date, eleven studio albums have been released under the Divine Comedy name.  The group achieved their greatest commercial success in the years 1996–99, during which they had nine singles that made the UK Top 40, including the top ten hit "National Express".

Barry Goudreau (album): Barry Goudreau is the debut self-titled album of original Boston guitarist Barry Goudreau.  Featuring Goudreau's Boston bandmates Brad Delp on lead vocals and Sib Hashian on drums (as well as future Boston singer Fran Cosmo), the album displays a sound very similar to that of Boston's first two releases, "Boston" (1976) and "Don't Look Back" (1978).  However, neither this album nor any of Goudreau's subsequent releases with other acts (Orion The Hunter, RTZ) proved to be as commercially successful as his work with Boston.  The album was released in 1980 and was Goudreau's only solo album.  The song "Dreams" was released as a single in 1980, nearly cracking "Billboard"'s top 100.  It still receives airplay today on Classic rock radio stations, as does "Mean Woman Blues".

Liberation (The Divine Comedy album): Liberation is a 1993 album by The Divine Comedy, released on Setanta.  It was the second album to be released by The Divine Comedy, although the band's leader, Neil Hannon, often refers to it as the first due to the stylistic differences of the earlier album, "Fanfare for the Comic Muse".  The album was recorded over the space of twelve days in March, 1993 by Hannon and Darren Allison.  Hannon played most of the instruments on the album, while Allison was the recording engineer and drummer.

Beatlejuice: Beatlejuice is an American Beatles cover band based in New England.  It initially featured Brad Delp, former front-man of the band Boston, on vocals, and has continued with other members since Delp's death in 2007.

Orion the Hunter (album): Orion the Hunter is the first (and, thus far, only) recording from the band Orion the Hunter, which was an offshoot of the band Boston (guitarist Barry Goudreau and vocalist Brad Delp -who sang backing vocals here- were also in Boston, and guitarist/vocalist Fran Cosmo would be in a later incarnation of that band).  The group also included Michael DeRosier (from the group Heart on drums & percussion).

Delp and Goudreau: Delp And Goudreau features Brad Delp and Barry Goudreau with Tim Archibald, Brian Maes, David Stefanelli, Patty Barkus, Lou Spagnola, and Jack o-Soro.  The album was recorded in Goudreau's home studio, featuring new tracks written by Delp and Goudreau.  Archibald, Maes and Stefanelli also served in Delp and Goudreau's post-Boston RTZ and played on their first and second records.

Life, Love &amp; Hope: Life, Love & Hope is the sixth studio album by American rock band Boston.  It was released on December 3, 2013 by Frontiers Records, making it their first studio album in eleven years.  It is the first album released following the death of Brad Delp.  Delp recorded vocals on the songs "Didn't Mean to Fall in Love", "Sail Away", "Someone", and "Te Quiero Mia", the last of which being a re-arrangement of "I Had a Good Time", from "Corporate America".

Brad Delp: Bradley Edward Delp (June 12, 1951 – March 9, 2007) was an American singer and songwriter, best known as the lead vocalist of the rock bands Boston and RTZ.

RTZ (band): RTZ (Return to Zero) was an American rock band that featured Boston band members Brad Delp and Barry Goudreau.  The band was formed in the early 90's.

Neil Hannon: Edward Neil Anthony Hannon (born 7 November 1970) is a Northern Irish singer and songwriter.  He is the creator and front man of the chamber pop group The Divine Comedy, and is the band's sole constant member.  Hannon wrote the theme tunes for the sitcoms "Father Ted" and "The IT Crowd".

Supporting paragraphs: Brad Delp Neil Hannon
Answer: singer and songwriter