Question: Are Ezra Koenig and Mike McColgan both lead vocalists?

Context articles: Run (Vampire Weekend song)
Giving Up the Gun
Free the Universe
Vampire Weekend
Unbelievers (Vampire Weekend song)
Hold Up (song)
Al Barr
Ezra Koenig
If I Loved You: Gentlemen Prefer Broadway
Mike McColgan

"Run" is a single released by Indie band Vampire Weekend.
 It is the sixth and final single from their second album Contra, and was released in the United Kingdom on December 13, 2010.
 There was no music video produced.
 Lead singer Ezra Koenig said that the song was based on the Bruce Springsteen song, "Born to Run".
 The single failed to chart.
"Giving Up the Gun" is the second single from Vampire Weekend's second album "Contra".
 The song was originally performed by L'Homme Run, a comedic rap duo that featured Vampire Weekend vocalist Ezra Koenig.
 The video was released February 19, 2010.
 Koenig got the idea for the song from Noel Perrin's 1979 book titled "Giving Up the Gun" given to him by his father.
Free the Universe is the second full-length studio album released by Major Lazer, collaborative music group headed by record producer Diplo.
 The album was released on April 16, 2013, and features appearances by Vampire Weekend's Ezra Koenig, Dirty Projectors' Amber Coffman, Santigold, Peaches, Tyga, Flux Pavilion, Bruno Mars, Wyclef Jean, Shaggy, and more.
 The album peaked at No. 34 in both the "Billboard" 200 and the UK Albums Chart.
Vampire Weekend is an American rock band from New York City, formed in 2006.
 They are currently signed to XL Recordings.
 The band consists of lead vocalist and guitarist Ezra Koenig, drummer and percussionist Chris Tomson and bassist and backing vocalist Chris Baio.
 The band's first album "Vampire Weekend" (2008) – which included the singles "Mansard Roof", "A-Punk", "Oxford Comma", "Cape Cod Kwassa Kwassa" and "The Kids Don't Stand a Chance" – was acclaimed by critics for its world music influences.
 Their following album, "Contra" (2010), was similarly acclaimed and garnered strong commercial success.
 Their third studio album, "Modern Vampires of the City" (2013), won the group a Grammy Award for Best Alternative Music Album in 2014.
"Unbelievers" is a song by American indie pop band Vampire Weekend.
 Written by the band's lead singer Ezra Koenig and multi-instrumentalist Rostam Batmanglij, and produced by Ariel Rechtshaid and Batmanglij, the song was released as the third single from their third studio album "Modern Vampires of the City" in August 2013.
 The band initially premiered "Unbelievers" in a live performance on "Jimmy Kimmel Live" on October 31, 2012.
 They also performed the song live on an episode of "Saturday Night Live" prior to it being released as a single.
"Hold Up" is a song recorded by American singer Beyoncé for her sixth studio album, "Lemonade" (2016).
 The song was serviced to rhythmic radios in the United States on August 16, 2016 as the third single from the album.
 It was written by Diplo, Ezra Koenig, Beyoncé, Emile Haynie, Josh Tillman, MNEK and Sean "Melo-X" Rhoden.
Alexander Martin Barr (born January 21, 1968) has been the lead singer of the Dropkick Murphys since 1998.
 He was also a founder and lead singer for The Bruisers, which he helped form in 1988 in Portsmouth, New Hampshire.
 His first band circa 1984, was called D.V.A. (Direct Vole Assault).
 He also went on to front 5 Balls of Power, with future members of Scissorfight, The Radicts, L.E.S. Stitches, and US Bombs, before he formed The Bruisers.
 His band the Bruisers had played many shows with Boston's Dropkick Murphys, and when Dropkick lead singer Mike McColgan quit the band in 1998 the Murphys asked Barr to be the new lead singer.
 The first album the Dropkick Murphys released with Barr as singer was 1999's "The Gang's All Here".
Ezra Michael Koenig (born April 8, 1984) is an American musician, singer, songwriter, and radio personality.
 He is the lead vocalist and guitarist of the indie rock band Vampire Weekend.
If I Loved You: Gentlemen Prefer Broadway — An Evening of Love Duets is a show conceived and directed by American-Canadian singer-songwriter Rufus Wainwright, which premiered on June 14, 2014 during Luminato in Toronto, Ontario, Canada.
 The concert featured men singing classic love songs to one another, and included a full orchestra and performances by Wainwright and special guests Boy George, David Byrne, Josh Groban and Steven Page.
 Countertenor Brennan Hall, Brent Carver, Glen Hansard, Ezra Koenig and Andrew Rannells also appeared.
 The program featured songs written by gay men, including Noël Coward, Lorenz Hart, Jerry Herman and Cole Porter.
Michael "Mike" McColgan is best known as the original lead singer of the American outfit Dropkick Murphys and the lead singer of the Street Dogs.