Other musicians playing with Queen

There have been very few of these over the years, but enough to give them their own section (it adds up once you start writing them down).

Andy Gibb
Vocals on first verse of unreleased version of "Play The Game"

Arif Martin
Hot and Spacey horns on "Staying Power"

Catherine Porter (see also solo section)
Backing vocals on "Let Me Live"

David Bowie
Vocals on "Under Pressure"
Backing vocals on unreleased version of "Cool Cat"

Fred Mandel (see also solo section)
Live keyboards with Queen on 1981 and 1982 tours
Rip roaring piano finale on "Man On The Prowl"
Synthesizer arrangements and programming on "Radio Ga Ga"
Synth solo on "I Want To Break Free"
Candy floss on "Hammer To Fall"

Gary Martin
Backing vocals on "Let Me Live"

Joan Armatrading
Backing vocals on "Don't Lose Your Head"

John Anthony
Backing vocals on "Modern Times Rock 'N' Roll"

Lynton Naiff
Strings on "One Year of Love"

Mack
Demolition fairlight programming on "Machines"

Mike Moran (see also solo section)
Piano on "All God's People"

Mike Stone
Backing vocals on "Good Old Fashioned Lover Boy"

Miriam Stockley (see also solo section)
Backing vocals on "Let Me Live"

Morgan Fisher
Live keyboards with Queen on 1982 tour

Rebecca Leigh-White
Backing vocals on "Let Me Live"

Royal Philharmonic Orchestra
Orchestra on "Who Wants To Live Forever"

Steve Gregory
Saxophone on "One Year Of Love"

Steve Howe
Wandering Minstrel Spanish Guitar on "Innuendo"

Other musicians guesting on solo records

Members of The Cross have not been counted when playing on Cross albums, and members of The Brian May Band have not been counted when playing on "Live At Brixton". Musicians on other solo albums have been counted.

This section is so long I am thinking of splitting it into "people you may have heard of" and "people you'll never have heard of" sections!

Alan Gratzer
Drums on "Star Fleet Project" album

Andy Pask
Bass on "In My Defence"

Barry Castle
Horn on "Barcelona"

Brett Morgan
Drums on "Time"

Candy Yates
Backing vocals on "Baby It's Alright" and "The Also Rans"

Carol Woods
Backing vocals on "The Golden Boy"

Catherine Porter
Backing vocals on "Old Friends" and "Everybody Hurts Sometime"

Chris Thompson
Co-vocals and backing vocals on "Rollin' Over"
Backing vocals on early Brian May Band concerts

Clare Yates
Backing vocals on "Baby It's Alright" and "The Also Rans"

Cozy Powell
Drums on "Resurrection", "Nothing But Blue", "Back To The Light", "I'm Scared", "Love Token" and "Driven By You (new version)"

Curt Cress
Drums on "Mr Bad Guy" album

David Richards
Approx 50% of keyboards on "Fun In Space" album

Debbie Bishop
Backing vocals on "The Golden Boy"

Deborah Ann Johnston
Cello on "Barcelona"

Dick Marx
String Arrangement on "Foreign Sand","Final Destination"

Don Airey
Keyboards on "Resurrection" and "Nothing But Blue"

Edward Van Halen
Guitar on "Star Fleet Project" album

Frank Ricoffi
Percussion on "Barcelona"

Fred Mandel
Keyboards on "Star Fleet Project" album
Piano, Synthesizer, Guitar on "Mr Bad Guy" album

Gary Tibbs
Bass on "Back To The Light","Let Your Heart Rule Your Head","Rolling Over"

Geoff Dugmore
Drums on "Let Your Heart Rule Your Head","Rolling Over"

Geoffrey Richardson
Violin/viola on "Baby It's Alright" and "Life Changes"

Gill O'Donovan
Backing vocals on "Shove It" album
Backing vocals with The Cross on 1988 tour
Backing vocals on "Back To The Light","Let Your Heart Rule Your Head"

Giorgio Moroder
Keyboards on "Love Kills"

Graham Jarvis
Drums on "In My Defence"

Helen Liebman
Cello on "Baby It's Alright" and "Life Changes"

Homi Kanga
Violin on "Barcelona"

Jason Falloon
Guitar on "Happiness?" album (not "Foreign Sand"/"Final Destination")
Guitar with Roger on 1994/5 tour

Jim Cregan
Guitars on "Foreign Sand","Final Destination"

Jo Burt
Fretless Bass on "Man Made Paradise"

John Christie
Backing vocals on "Time"

Joshua J. Macrae
Programming on "Happiness?" album (not "Foreign Sand"/"Final Destination")
Drums with Roger on 1994/5 tour

Lance Ellington
Backing vocals on "The Golden Boy"

Laurie Lewis
Violin on "Barcelona"

Madeleine Bell
Backing vocals on "The Golden Boy"

Maggie Ryder
Backing vocals on "Back To The Light","Rolling Over"
Backing vocals on early Brian May Band concerts

Mark Williamson
Backing vocals on "The Golden Boy"

Mike Crossley
Piano and keyboards on "Happiness","Touch The Sky","Freedom Train","The Key","Old Friends"
Piano and keyboards with Roger on 1994/5 tour

Mike Moran
Keyboards on "Time" and "In My Defence"
Piano on all of "Barcelona" album
Keyboards with The Cross in December 1988 and December 1990 concerts
Piano on "Rolling Over", "Last Horizon", "Love Token"

Miriam Stockley
Backing vocals on "The Golden Boy"
Backing vocals on "Back To The Light","Rolling Over"
Backing vocals on early Brian May Band concerts

Neil Murray
Bass on "I'm Scared", "Love Token" and "Driven By You (new version)"

Paul Vincent
Lead guitar on "Mr Bad Guy" album
Guitar on "In My Defence"

Peter Banks
Synthesizer on "In My Defence"

Peter Straker
Backing vocals on "Time"
Backing vocals on "The Great Pretender" (probably)
Backing vocals on "The Golden Boy"

Phil Chen
Bass on "Star Fleet Project" album
Bass on "Foreign Sand","Final Destination"

Phil Spalding
Bass on "Revelation","The Key","Old Friends"

Ray Russell
Guitar on "Time"

Rick Parfitt
Guitar on "It's An Illusion"

Stephan Wissnet
Bass on "Mr Bad Guy" album

Stuart Bradley
Bass with Roger on 1994/5 tour

Suzie O'List
Backing vocals on "Shove It" album
Backing vocals with The Cross on 1988 tour
Backing vocals on "Back To The Light","Let Your Heart Rule Your Head"

Yoshiki
Piano, drums, arrangement on "Foreign Sand","Final Destination"

Mutual collaborations

There are also the following cameos on each others solo records

Roger sings backing vocals on "Star Fleet"
Roger sings backing vocals on "The Great Pretender" (probably)
Brian plays guitar on "Love Lies Bleeding"
Freddie sings on "Heaven For Everyone"
Freddie sings backing vocals on "Killing Time" (rumoured to have co-written)
John plays bass on "How Can I Go On"
John plays bass on "Nothing But Blue"
John plays bass on some track(?s) on "Shove It" - don't know which.
John remixed the 7" and 12" versions of "I Cry For You"