Here’s the COMPLETE list in order of appearance:

1. Regina Wilson – NY Firefighter (USA🇺🇸) 2. Angélique Kidjo – Singer (Benin🇧🇯) 3. Cody Simpson – Singer (Australia🇦🇺) 4. Bloom Twins – Singers (Ukraine🇺🇦) 5. Bill Kaulitz & Sigrid Agren – Singer (Germany🇩🇪) / Model (France🇫🇷) 6. Danny O’Donoghue & Roarke – Singer (Ireland🇮🇪) / Singer (USA🇺🇸) 7. Neymar Jr – Footballer (Brazil🇧🇷), Khaled Abol Naga – Actor (Egypt🇪🇬) & Girl – Sign language interpreter (Bulgaria🇧🇬) 8. Idris Elba – Actor (United Kingdom🇬🇧), Kate Nauta – Model (USA🇺🇸), Jenny Bapst – Singer (France🇫🇷), Francois Alexander – Singer (USA🇺🇸), Samantha Rex – Singer and model (USA🇺🇸), Lance Bass – Singer (USA🇺🇸) & Dash Mihok – Actor (USA🇺🇸) 9. Priyanka Chopra & Suki Waterhouse – Singer and actress (India🇮🇳) / Model and actress (United Kingdom🇬🇧) 10. Craig David & Nicole Scherzinger – Singer (United Kingdom🇬🇧) / Singer (USA🇺🇸) 11. Daniela Mercury – Singer (Brazil🇧🇷) 12. Zelda Williams & Joan Sebastian – Actress (USA🇺🇸) / Singer and composer (Mexico🇲🇽) 13. Puffy AmiYumi – Singers (Japan🇯🇵) 14. Nasri Atweh & María Gabriela de Faría – Singer (Canada🇨🇦) / Actress and singer (Venezuela🇻🇪) 15. Ban Ki Moon & Professional Performing Arts School Choir Members – UN Secretary General (South Korea🇰🇷) / School Choir (USA🇺🇸) 16. Family School Students – International Students (NYC based🇺🇸) 17. David Guetta – Music Producer/DJ (France🇫🇷) 18. Courtney Cox & Coco Arquette – Actress & daughter (USA🇺🇸) 19. Doni & Akai Floyd – Mother & daughter (USA🇺🇸) 20. Pau Gasol – Basketball player (Spain🇪🇸) 21. David Arquette – Actor (USA🇺🇸), Melissa Etheridge – Singer (USA🇺🇸), Isaiah Mustafa – Actor (USA🇺🇸) & Scott Foley – Actor (USA🇺🇸) Bo Koehler – Model (Netherlands🇳🇱), Callan McAuliffe – Actor (Australia🇦🇺), Yuna Kim – Figure skater (South Korea🇰🇷) & Bianca Yuzon – Singer (Philippines🇵🇭) 22. Justin Bartha & Asa Bartha – Actor & daughter (USA🇺🇸) 23. Eric Christian Olsen & Antonella Barba – Actor (USA🇺🇸) / Singer (USA🇺🇸) 24. Jamaican Children (Jamaica, of course🇯🇲) 25. Rumer Willis – Actress and singer (USA🇺🇸) 26. Katy Perry – Singer (USA🇺🇸) 27. Sonu Nigam – Singer (India🇮🇳), Rebecca da Costa – Actress (Brazil🇧🇷) & Seth Green – Actor (USA🇺🇸) 28. Adam Lambert – Singer (USA🇺🇸) 29. Butch Vig – Music Producer (USA🇺🇸), Antonique Smith – Actress (USA🇺🇸), Eden Espinosa – Singer (USA🇺🇸), David Broza – Singer (Israel🇮🇱) & Joshua Henry – Singer (Canada🇨🇦) 30. will.i.am – Musician (USA🇺🇸) 31. Cambodian children (Cambodia, of course🇰🇭) 32. University of Wisconsin Badger Band (USA🇺🇸) 33. Taye Diggs – Actor (USA🇺🇸), Patricia Arquette & Harlow Jane – Actress & daughter (USA🇺🇸), Ben Barnes – Actor (United Kingdom🇬🇧) & Eric Benét – Singer (USA🇺🇸) 34. Sam Martin & Dianna Agron – Singer (USA🇺🇸) / Actress (USA🇺🇸) 36. Sunidhi Chauhan – Singer (India🇮🇳), Anthony Lake – Executive Director of UNICEF (USA🇺🇸) & Segal+Purcell Children, Polyphony Quartet (cannot find info🇺🇳) 37. Nina Dobrev – Actress (Bulgaria🇧🇬), Julian Morris – Actor (United Kingdom🇬🇧), Poe – Singer (USA🇺🇸), Sanaa Lathan – Actress (USA🇺🇸) & Amy Brenneman – Actress (USA🇺🇸) 38. Trevor Jackson & Namibian Children – Singer (USA🇺🇸) / Students (Namibia🇳🇦) 39. Samantha Cristoforetti – Astronaut (Italy🇮🇹) 40. Professional Performing Arts School Choir Members – School Choir (USA🇺🇸) 41. Yoko Ono & John Lennon – Artist (Japan🇯🇵) / Musician (United Kingdom🇬🇧)