Ashlee Simpson – Boyfriend

Drums – Jeff Rothschild
Keyboards [Additional Keyboards By], Programmed By – Dan Chase
Mixed By – John Shanks
Mixed By – Jeff Rothschild
Producer, Guitar, Bass, Keyboards – John Shanks
Written-By – John Shanks
Written-By – Ashlee Simpson
Written-By – Kara DioGuardi

Drums – Jeff Rothschild
Mixed By – John Shanks
Mixed By – Jeff Rothschild
Producer, Guitar, Bass, Keyboards – John Shanks
Remix, Producer [Additional Production By] – David Garcia
Remix, Producer [Additional Production By] – Morgan Page
Written-By – John Shanks
Written-By – Ashlee Simpson
Written-By – Kara DioGuardi

Backing Vocals [Background Vocals By] – Ashlee Simpson
Backing Vocals [Background Vocals By] – Kara DioGuardi
Coordinator [Production Coordinator], Contractor – Shari Sutcliffe
Drums – Jeff Rothschild
Engineer [Additional Engineering By] – Mark Valentine
Engineer [Assistant Engineering By] – Glen Pittman
Mixed By – John Shanks
Mixed By – Jeff Rothschild
Producer, Guitar, Bass, Keyboards – John Shanks
Recorded By – Jeff Rothschild
Remix, Producer [Additional Production By] – The Sharp Boys
Written-By – John Shanks
Written-By – Ashlee Simpson
Written-By – Kara DioGuardi

Film Director [Video Directed By] – Marc Webb (2)
Film Producer [Video Produced By] – Gina Leonard