Indonesian Idol (musim 12)
Peserta Yang Pernah Mengikuti Kompetisi Lainnya

Sebelum mengikuti Indonesian Idol pada musim ini, beberapa peserta di bawah ini sebelumnya sudah mengikuti ajang pencarian bakat di beberapa stasiun televisi swasta, di antaranya:
| Peserta | Acara TV | Musim | Hasil terbaik | Catatan |
| --- | --- | --- | --- | --- |
| Abdul Azis | The Voice Kids Indonesia | 4 | Babak Blind Audition | * |
| Adi Putra Sihotang | Indonesian Idol | 10 | Babak Audisi | * |
| Agustina Nanda Monica Lewar | The Voice Kids Indonesia | 3 | Babak Battle Rounds | * |
| Alexander Dicky A.B Redo | Pop Academy | 1 | Babak Audisi Final | * |
| Alfredo Fernando John Pongilatan | Starvoices Indonesia | 7 | Babak Top 25 besar | * |
| Alfredo Fernando John Pongilatan | X Factor Indonesia | 3 | Bootcamp 1 | * |
| Andi Gunawan | X Factor Indonesia | 3 | Judge's Home Visit | * |
| Amanda Refita | Indonesian Idol | 10 | Babak Audisi | Video audisi tidak ditampilkan |
| Anna Krisna | Indonesian Idol | 11 | Babak Eliminasi I | Video penampilan tidak ditampilkan |
| Annisa Anastasia Areros | Idola Cilik | 5 | Babak Pentas Top 9 besar | * |
| Antonio Manurung | The Voice Indonesia | 4 | Babak Knockout | * |
| Antonio Manurung | X Factor Indonesia | 3 | Bootcamp 1 | * |
| Antonio Manurung | The Voice: All-Stars (Indonesia) | 2022 | Babak Knockout | * |
| Ardya Putri Gita Asmara | The Voice Kids Indonesia | 4 | Babak Live Round Top 24 besar | * |
| Ardya Putri Gita Asmara | The Voice: All-Stars (Indonesia) | 2022 | Babak Semifinal | * |
| Ardya Putri Gita Asmara | The Indonesian Next Big Star | 1 | Babak 15 Besar | * |
| Astrid Caecilia Tarigan | Indonesia Mencari Bakat | 3 | Eliminasi Babak 17 besar | * |
| Astrid Caecilia Tarigan | Starvoices Indonesia | 4 | Eliminasi Babak 12 besar | * |
| Astrid Caecilia Tarigan | The Voice Indonesia | 2 | Babak Pertunjukan Langsung | * |
| Bunga Reyza | Voice of Ramadan | 2019 | Babak Top 5 Besar | * |
| Chaterine Evelyna Pramesthi Kirana | Indonesian Idol Junior | 1 | Babak Eliminasi | * |
| Chaterine Evelyna Pramesthi Kirana | Indonesian Idol Junior | 2 | Babak Eliminasi 2 | * |
| Chaterine Evelyna Pramesthi Kirana | The Voice Kids Indonesia | 3 | Babak Semifinal Top 12 besar | * |
| Chaterine Evelyna Pramesthi Kirana | Indonesian Idol | 10 | Babak Eliminasi 2 | * |
| Chelsea G. Hadi | Indonesian Idol | 8 | Babak Eliminasi 3 Top 27 besar | * |
| Chelsea G. Hadi | Indonesia Mencari Bakat | 4 | Babak 12 besar | * |
| Chrisalia Rebecca | Starvoices Indonesia | 6 | Babak Eliminasi Top 33 besar | * |
| Dea Malinda Laksmono | X Factor Indonesia | 3 | Babak Boothcamp | * |
| Dimansyah Rizkita Laitupa | Indonesian Idol | 10 | Babak Eliminasi 2 | * |
| Gabriel Angeline Thalita Pangemanan | Idola Cilik | 3 | Babak Pentas Top 13 besar | * |
| Inocent Purwanto | Rising Star Indonesia | 1 | Babak Live Audition | * |
| Irvan Manurung | X Factor Indonesia | 3 | Babak Audition | * |
| Jaqlien Elsy Maukaling | The Voice Indonesia | 3 | Babak Pertunjukan Langsung | * |
| Jaqlien Elsy Maukaling | The Voice: All-Stars (Indonesia) | 2022 | Babak Grand Final | * |
| Jean Harly Harefa | The Voice Indonesia | 4 | Babak Gugur | * |
| Jean Harly Harefa | The Voice: All-Stars (Indonesia) | 2022 | Babak Grand Final | * |
| Kevin Hugo | Indonesian Idol | 10 | Babak Eliminasi I | * |
| Khaerunnisa Putri Resky | La Academia Junior Indonesia | 1 | Babak Semifinal | * |
| Khaerunnisa Putri Resky | The Voice Kids Indonesia | 1 | Babak Blind Audition | * |
| Khaerunnisa Putri Resky | Indonesian Idol Junior | 2 | Babak Spektakuler Top 12 | * |
| Khaerunnisa Putri Resky | Indonesian Idol Junior | 3 | Babak Spektakuler Top 6 | * |
| Kristoforus Mario Farrel Nugroho | I Can See Your Voice Indonesia | 5 | Tereliminasi di babak lipsync sebagai Good Voice | Berperan sebagai Idola Cilik pada episode Betrand Peto Putra Onsu & Anneth Delliecia |
| Maria Puspita Dewi Sinaga | Starvoices Indonesia | Starvoices Live 2018 | Tempat Ketiga (Kategori Teens) | * |
| Maria Puspita Dewi Sinaga | Starvoices Indonesia | Starvoices Live 2019 | Juara (Kategori Teens) | * |
| Maria Puspita Dewi Sinaga | Starvoices Indonesia | 7 | Babak Top 25 besar | * |
| Maria Puspita Dewi Sinaga | Pop Academy | 1 | Babak 12 Besar | * |
| Maria Puspita Dewi Sinaga | The Indonesian Next Big Star | 1 | Babak 15 Besar | * |
| Maria Tarihoran | Indonesian Idol | 10 | Babak Audisi | Video audisi tidak ditayangkan |
| Michelle Sandrina Tobing | Indonesia Mencari Bakat | 2 | Babak Audisi | * |
| Michelle Sandrina Tobing | Indonesian Idol Junior | 1 | Babak Eliminasi 3 | * |
| Michelle Sandrina Tobing | The Voice Kids Indonesia | 1 | Babak Live Shows Top 24 besar | * |
| Monica Christiana | Idola Cilik | 5 | Babak Menuju Pentas | * |
| Monica Christiana | The Voice Kids Indonesia | 1 | Babak Tempur | * |
| Monica Christiana | Asia's Got Talent | 3 | Judges Audition | * |
| Monica Christiana | Starvoices Indonesia | 6 | Eliminasi 1 | * |
| Morietnez Azra Mashuri | Indonesian Idol Junior | 1 | Babak Praspektakuler Top 16 Besar | * |
| Morietnez Azra Mashuri | The Voice Kids Indonesia | 1 | Babak Live Shows Top 24 besar | * |
| Mutiya Febriani K | Indonesian Idol | 10 | Babak Audisi | Video audisi tidak ditayangkan |
| Naila Dhara | X Factor Indonesia | 3 | Babak Boothcamp | * |
| Naora Anindya Larasati | Indonesian Idol Junior | 2 | Babak Spektakuler Top 7 | * |
| Neyl Author | The Voice Indonesia | 2 | Babak Blind Audition | * |
| Nur Anis Novinda | The Voice Indonesia | 3 | Babak Live Rounds Top 32 besar | * |
| Novia Situmeang | X Factor Indonesia | 3 | Babak The Chairs | * |
| Olivia Nelbra | Singing Battle Indonesia | 2018 |  | * |
| Pande Putu Damae Anggis Devaki | I Can See Your Voice Indonesia | 1 | Tereliminasi di babak lipsync sebagai Good Voice | Berperan sebagai Princess Jazz pada episode spesial Melly Goeslaw |
| Pande Putu Damae Anggis Devaki | The Voice Kids Indonesia | 2 | Runner Up | * |
| Paula Magdalena | Indonesian Idol | 10 | Babak Eliminasi I | * |
| Putri Rahayu Jasmin | Indonesian Idol Junior | 3 | Babak Eliminasi I | * |
| Putri Rahayu Jasmin | The Voice Kids Indonesia | 4 | Babak Blind Audition | * |
| Rachel Olivia Hutauruk | Idola Cilik | 5 | Babak Menuju Pentas | Rachel merupakan bagian dari grup R Three |
| Rahman Sadli Waraiya | Indonesian Idol | 10 | Babak Eliminasi 2 | * |
| Rahman Sadli Waraiya | Starvoices Indonesia | 7 | Babak Top 25 besar | (Mengundurkan Diri) |
| Raisa Syarla Martiza | The Voice Kids Indonesia | 3 | Babak Live Rounds Top 24 Besar | * |
| Rashilla Diva | The Voice Indonesia | 3 | Babak Blind Audition | * |
| Reza Aditya | Indonesian Idol | 9 | Babak Eliminasi 2 | * |
| Rion Laode | Indonesian Idol | 10 | Babak Eliminasi 2 | * |
| Rony Parulian | Idola Cilik | 4 | Babak Audisi | Video Audisi tidak ditampilkan |
| Rony Parulian | Indonesian Idol Junior | 1 | Babak Eliminasi | * |
| Rony Parulian | Indonesian Idol | 10 | Babak Audisi | Video Audisi tidak ditampilkan |
| Rosalina Samosir | Mamamia Show | 4 | Pemenang | * |
| Rosalina Samosir | Rising Star Indonesia | 3 | Babak Final Duel | Rosalina merupakan bagian dari Alison Voice |
| Salma Salsabil 'Aliyyah | Idola Cilik | 4 | Babak Pentas Idola Cilik (Top 9) | * |
| Salma Salsabil 'Aliyyah | The Voice Kids Indonesia | 1 | Babak Battle Rounds | * |
| Salma Salsabil 'Aliyyah | Rising Star Indonesia | 2 | Babak Live Audition | * |
| Salma Salsabil 'Aliyyah | Sunsilk Hijab Hunt | 2017 | Babak Final | * |
| Salma Salsabil 'Aliyyah | The Voice Indonesia | 3 | Babak Blind Audition | * |
| Silvia Ria Minonsih | The Next Boy/Girl Band | 2 | Babak Audisi Live Singing | Gagal menempati Hotseater Team Girls pada episode 7 |
| Skyrio Chandra | Indonesian Idol Junior | 3 | Babak Eliminasi I | * |
| Tesalonika Manalu | The Voice Indonesia | 4 | Runner Up Ketiga | * |
| Theodorus Erluph Batara Dewa | X Factor Indonesia | 3 | Babak Boothcamp | * |
| Uluf Nur Barlenty | Indonesian Idol | 10 | Babak Eliminasi I | * |
| Vanessa Bella | Starvoices Indonesia | Starvoices Live 2018 | Finalis 12 besar (Kategori Kids) | * |
| Viera Chas | Indonesian Idol | 11 | Babak Eliminasi I | * |
| Violeta Ratu Azzura | The Voice Kids Indonesia | 4 | Babak Blind Audition | * |
| Widya Angela Hartanto | The Voice Indonesia | 4 | Babak Knock-out | * |
| Yakobus Liberto Promensia Ndopo | The Voice Indonesia | 4 | Babak Battle Rounds | * |
| Yessicha Sabrina Tarigan | Indonesian Idol | 10 | Babak Eliminasi I | * |
| Yohana Vanda | I Can See Your Voice Indonesia | 4 | Tereliminasi di babak bukti sebagai Good Voice | Berperan sebagai Gadis Broadway pada episode Sandhy Sondoro |
| Yohana Vanda | Sing Like Mama GTV | 2021 | Babak Grand Final | * |
| Zevana Arga Ane Angesti | Idola Cilik | 3 | Babak Pentas Top 12 besar | * |