Eric Adams (born Louis Marullo, July 12, 1954) has been the singer of the American heavy metal band Manowar since its inception in 1980.
 Previously, he sang for a group called LOOKS, a band which also included future Manowar bassist and childhood friend, Joey DeMaio.
David Paton Balfour (12 July 1841 – 13 July 1894) was a New Zealand sheepfarmer, station manager, roading supervisor and diarist.
 He was born in Monikie, Forfarshire, Scotland on 12 July 1841.
The Alan Parsons Project was the collective reference to several lineups of a British progressive rock team, active between 1975 and 1990, whose rosters consisted of Alan Parsons and Eric Woolfson surrounded by a varying number of session musicians and some relatively consistent band members such as guitarist Ian Bairnson, arranger Andrew Powell, bassist and vocalist David Paton, drummer Stuart Elliott, and vocalist Lenny Zakatek.
David Paton (born 29 October 1949, Edinburgh, Scotland) is a Scottish bassist, guitarist and singer.
Eric Van Den Brink is a musician and record producer from the Netherlands.
 He has released albums of his own work and is producer of a wide variety of collaborations under the pseudonym (and anagram) of "Nick Vernier Band".
 Featured collaborators include Blondie Chaplin, Probyn Gregory, Gerry Beckley (with Jeffrey Foskett), Paul Jones, David Paton, David Bullock, Iain Matthews, Matt Malley, Emitt Rhodes, Duncan Maitland, Pizza Delivery Boys, Janaki, and Iason Chronis, among others.
 Van Den Brink is also producer of Nick Vernier Band-mixes for Yoko Ono Plastic Ono Band.
The Kick Inside is the debut studio album by English singer-songwriter and musician Kate Bush.
 It was released on 17 February 1978 and contains her UK number one hit, "Wuthering Heights".
 The album peaked at number three on the UK Albums Chart and has been certified Platinum by the British Phonographic Industry.
 The production included efforts by several progressive rock veterans, including Duncan Mackay, Ian Bairnson, David Paton, Andrew Powell, and Stuart Elliott of The Alan Parsons Project, and David Gilmour of Pink Floyd.
David Paton, MD (born August 16, 1930) is a retired full-time ophthalmologist best known as Founder in 1970 of Project Orbis (now named Orbis International, Inc.) and thereafter as its first Medical Director helping to develop (1970–1982) and then deploy its teaching aircraft for ophthalmologists worldwide, especially in the developing nations.
 The initial aircraft was a donated DC-8 refurbished to contain an operating room, a teaching classroom and the necessary ancillary components for sharing “live” both surgical and medical techniques with colleagues abroad who were eager to learn by means of hands-on instruction.
 The instruction was provided by volunteer American and other skilled medical teachers from an eventually large number of countries.
 In 1988, the DC-8 was replaced by a larger and more complete teaching aircraft complex, housed in a formerly commercial DC-10.
 Thus far 88 countries have been visited, some repeatedly.
 By 2012, still another update of the Orbis aircraft will be prepared to further fulfill the various purposes of teaching optimal eye care internationally, principally by means of doctor-to-doctor techniques.
 Paton resigned from Orbis in 1987 and focused on other aspects of academic ophthalmology, but in 2011 he returned in a voluntary capacity to assist in fund raising for a new annual appointment, the David Paton Orbis Fellowship in Global Ophthalmology
Keats was a short-lived British band which produced one eponymous album in 1984.
 It was an Alan Parsons Project offshoot.
 Its members were Colin Blunstone (vocals), Ian Bairnson (guitars), Pete Bardens (keyboards), David Paton (bass and backing vocals) and Stuart Elliott (drums and percussion).
 Richard Cottle also provided additional keyboard parts, as well as saxophone and synthesizers.
Nick Vernier Band is an alias (and anagram) for productions by Dutch musician and record producer Eric Van Den Brink.
 Although a 'one man band' in essence, featured collaborators include Blondie Chaplin, Probyn Gregory, Gerry Beckley (with Jeffrey Foskett), Stephen John Kalinich, Paul Jones, David Paton, Iain Matthews, Matt Malley, Emitt Rhodes, Duncan Maitland, E.H. Roelfzema, Janaki, and Iason Chronis, among others.
 Van Den Brink is also producer of Nick Vernier Band-mixes for Yoko Ono and Plastic Ono Band.
Last of the Independents is the sixth album by rock group The Pretenders, released in 1994.
 For this album, the band is officially credited as being Chrissie Hynde (vocals, guitar), Adam Seymour (guitar), Andy Hobson (bass) and Martin Chambers (drums).
 However, this line-up only plays together on one track ("All My Dreams"); the rest of the album is performed by Hynde and Seymour in conjunction with a rotating series of musicians on bass and drums.
 These musicians include Hobson and Chambers, as well as bassists Andy Rourke, Tom Kelly and David Paton, and drummers Jimmy Copley and J.F.T. Hood.
 A few other session musicians also appear, including Ian Stanley, and one-time Pretenders guitarist Robbie McIntosh, who plays alongside Hynde and Seymour on "I'm a Mother".

Question: Are David Paton and Eric Adams both singers?
Answer: yes