Nicholas Jonas – Last Year Was Complicated

Engineer, Mixed By – James Royo
Instruments [All], Producer – Jason Evigan
Keyboards [Additional] – Marcus Kincy
Mixed By [Assistant] – Louie Gomez
Vocals – Nicholas Jonas
Written-By – Jason Evigan
Written-By – Nicholas Jonas
Written-By – Dewain Whitmore, Jr.

Engineer – James Royo
Engineer [For Mix] – John Hanes
Guitar – Pierre-Luc Rioux
Instruments [All], Producer – Jason Evigan
Keyboards [Additional] – Sean Douglas (3)
Mixed By – Serban Ghenea
Vocals – Nicholas Jonas
Written-By – Jason Evigan
Written-By – Nicholas Jonas
Written-By – Sean Douglas (3)
Written-By – Jonathan Tucker
Written-By – PJ Bianco

Backing Vocals – Julia Michaels
Bass, Drums, Finger Snaps, Handclaps, Keyboards, Marimba, Percussion, Producer, Programmed By – Mattman & Robin
Engineer [Assistant] – John Hanes
Featuring – Tove Lo
Mixed By – Serban Ghenea
Recorded By – Noah Passovoy
Recorded By – The Struts (2)
Recorded By – John Silas Cranfield
Written-By – Mattias Larsson (7)
Written-By – Justin Tranter
Written-By – Robin Fredriksson
Written-By – Tove Nilsson
Written-By – Julia Michaels

Backing Vocals – Deanna Dellacioppa
Mixed By – Tony Maserati
Mixed By [Assistant] – Tyler Scott
Producer – Sir Nolan
Recorded By – Nolan Lambroza
Written-By – Nolan Lambroza
Written-By – Simon Wilcox (2)
Written-By – Nicholas Jonas
Written-By – Sean Douglas (3)
Written-By – Julia Michaels

Bass, Drums, Finger Snaps, Guitar, Handclaps, Percussion, Programmed By, Synth – Mattman & Robin
Engineer – John Shullman
Engineer – Noah Passovoy
Engineer [Assistant] – Cory Bice
Engineer [For Mix] – John Hanes
Mixed By – Serban Ghenea
Producer – Mattman & Robin
Producer – Rico Love
Recorded By [Vocals] – Mattman & Robin
Recorded By [Vocals] – Rico Love
Recorded By [Vocals] – John Shullman
Recorded By [Vocals] – Noah Passovoy
Vocals – Nicholas Jonas
Written-By – Rico Love
Written-By – Priscilla Renea
Written-By – Brett James
Written-By – Mattias Larsson (7)
Written-By – Robin Fredriksson
Written-By – Nicholas Jonas

Featuring – Ty$
Mixed By – Serge Courtois
Producer – Sir Nolan
Recorded By – Nolan Lambroza
Written-By – Nolan Lambroza
Written-By – Priscilla Renea
Written-By – Tyrone Griffin (2)
Written-By – Nicholas Jonas

Engineer – Billy Hickey
Featuring – Big Sean
Instruments [All], Producer – Jason Evigan
Keyboards [Additional] – Sean Douglas (3)
Mixed By – James Royo
Mixed By [Assistant] – Louie Gomez
Recorded By [Big Sean Vocals] – Maximilian Jaeger
Vocals – Nicholas Jonas
Written-By – Sean Anderson (3)
Written-By – Jason Evigan
Written-By – Nicholas Jonas
Written-By – Sean Douglas (3)

Backing Vocals – Dewain Whitmore, Jr.
Engineer – James Royo
Engineer [For Mix] – John Hanes
Instruments [All], Producer – Jason Evigan
Mixed By – Serban Ghenea
Vocals – Nicholas Jonas
Written-By – Jason Evigan
Written-By – Nicholas Jonas
Written-By – Dewain Whitmore, Jr.

Mixed By – Tony Maserati
Mixed By [Assistant] – Tyler Scott
Producer – Sir Nolan
Recorded By – Nolan Lambroza
Written-By – Nolan Lambroza
Written-By – Simon Wilcox (2)
Written-By – Nicholas Jonas

Backing Vocals – Savan Kotecha
Bass – Ali Payami
Bass – Rickard Göransson
Drums – Ali Payami
Drums – Shellback (2)
Edited By [Vocals] – Peter Carlsson (3)
Engineer – Sam Holland
Engineer – Eric Weaver
Engineer [Assistant] – Cory Bice
Engineer [For Mix] – John Hanes
Guitar – Shellback (2)
Keyboards, Programmed By, Synth – Ali Payami
Mixed By – Serban Ghenea
Producer – Ali Payami
Producer – Max Martin
Producer – Shellback (2)
Written-By – Bebe Rexha
Written-By – Ali Payami
Written-By – Rickard Göransson
Written-By – Savan Kotecha
Written-By – Max Martin

Mixed By – Serge Courtois
Producer – Sir Nolan
Recorded By – Nolan Lambroza
Written-By – Nolan Lambroza
Written-By – Ilsey Juber
Written-By – Nicholas Jonas

Bass [Additional], Keyboards, Piano – Marcus Kincy
Engineer, Mixed By – James Royo
Guitar, Vocals – Nicholas Jonas
Instruments [All] – Jason Evigan
Mixed By [Assistant] – Jason Goldberg (2)
Mixed By [Assistant] – Louie Gomez
Producer, Written-By – Jason Evigan
Producer, Written-By – Nicholas Jonas

Bass, Drums, Keyboards, Producer – Ldn Noise
Mixed By – Ldn Noise
Mixed By – Jeff Ellis
Recorded By – Nicholas Jonas
Written-By – Greg Bonnick
Written-By – Patrick J. Que Smith
Written-By – Nicholas Jonas
Written-By – Hayden Chapman
Written-By – Dewain Whitmore, Jr.

Backing Vocals – Daniella Mason
Backing Vocals – Stella Maxwell
Backing Vocals – Nicholas Jonas
Featuring – Daniella Mason
Guitar – Chris Young (20)
Instruments [All Additional], Producer, Programmed By – Nicholas Jonas
Mixed By – Jesse String
Written-By – Daniella Mason
Written-By – Chris Young (20)
Written-By – Nicholas Jonas

Backing Vocals – Paul Shelton
Bass, Guitar – Magnus Martinsen
Drums – Magnus Martinsen
Drums – Petter Walthinsen
Drums – Stig Værnes
Keyboards – Magnus Martinsen
Keyboards – Anthony Vasquez (3)
Keyboards – Petter Walthinsen
Keyboards – Paul Shelton
Mixed By, Recorded By – Jesse String
Percussion – Magnus Martinsen
Percussion – Petter Walthinsen
Producer – Most Wanted (11)
Producer – Kid Brother (2)
Programmed By – Magnus Martinsen
Programmed By – Anthony Vasquez (3)
Programmed By – Paul Shelton
Written-By – Magnus Martinsen
Written-By – Petter Walthinsen
Written-By – Paul Shelton
Written-By – Nicholas Jonas
Written-By – Alexander Pavlich

Bass, Drums, Guitar, Keyboards, Percussion, Programmed By, Recorded By – Nolan Lambroza
Mixed By – Tony Maserati
Mixed By [Assistant] – James Krausse
Producer – Sir Nolan
Written-By – Nolan Lambroza
Written-By – Simon Wilcox (2)
Written-By – Nicholas Jonas

Backing Vocals – Ammar Malik
Engineer, Instruments [All], Producer – Jason Evigan
Mixed By – Manny Marroquin
Producer [Vocals], Vocals – Nicholas Jonas
Recorded By [Vocals] – Jesse String
Written-By – Ammar Malik
Written-By – Jason Evigan
Written-By – Danny Parker (3)

Backing Vocals – Talay Riley
Backing Vocals – Ian Kirkpatrick
Backing Vocals – Sean Douglas (3)
Backing Vocals – Marcus Lomax
Guitar – Ian Kirkpatrick
Mixed By – Manny Marroquin
Mixed By [Assistant] – Jeff Jackson (7)
Mixed By [Assistant] – Chris Galland
Mixed By [Assistant] – Ike Schultz
Producer, Programmed By – The Monsters & Strangerz
Producer, Programmed By – Ian Kirkpatrick
Recorded By – Stefan Johnson
Written-By – Sam Martin (5)
Written-By – Stefan Johnson
Written-By – Talay Riley
Written-By – Jordan Johnson (2)
Written-By – Ian Kirkpatrick
Written-By – Sean Douglas (3)
Written-By – Marcus Lomax