2 x 2

Gigi

• Armand Maulana - vokal
• Dewa Budjana - gitar, banjo, soprano electric, sitar, sythesizer guitar, banshee talked box, vokal latar
• Budhy Haryono - drum, jembe, bongo, shaker, tamborin, vokal latar
• Opet Alatas - bass akustik & listrik, vokal latar

Musisi tambahan

• Netta Kusuma - background vocal
• Kevin - vokal ("Selamat Ulang Tahun")
• Children voice: Diyane, Didie, Otto, Bowo, Tonni, Adi ("Selamat Ulang Tahun")
• Dodi Keswara ("Flamenco")
• Sak Unine String Trio ("Bumi Meringis", "Ingin Ku Bicara")
• Oni - violin
• Helmy - violin
• Wawan - cello
• Indra Lesmana - sythesizer solo ("Tractor") left chanel
• Billy Sheehan - bass ("Mereka", "Cry Baby"), Bass Solo ("Mereka")
• Barisan Perkusi Idea-Bandung ("Sang Nayaga")

Horn section ("Cry Baby", "Mereka")

• Harry Kim - horn
• Eric Marienthal - alto saxophone, Saxophone Solo ("Cry Baby")
• Arturo Velasco - trombone

• Budi Winarto - Horn Section Coordinator
• Horn arr by Dewa Budjana on "Cry Baby" & "Mereka"
• String arr by Dewa Budjana on "Bumi Meringis" & "Ingin Ku Bicara"
• Vocal arr by Armand Maulana
• Percussion arr by Budhy Haryono

Produksi

• Produser: Armand Maulana & Dewa Budjana
• Produser Eksekutif: GIGI Management
• GIGI Management: Dhani "Moerpette" Widjanarko, Rio "Cool Cat" F. Soelaiman
• GIGIKITA Fans Club: Indra, Nio & Rafles

Recording engineer

• Ronald Parinsi (basic track kecuali "Cry Baby, "Flamenco")
• Rudra Pritz (final track all songs)
• Alan R. Hirshberg (overdubb Billy Sheehan dan horn section) - Fox Force Five - Hollywood
• Mixed oleh Alan R. Hirshberg di Fox Force Five Studio - Hollywood
• Mastered oleh Chris Bellman di Bernie Grundman Mastering - Hollywood
• Fotografi: Firdaus Fadlil
• Art Director: Dimas Djayadiningrat