A new charity hit single

Question

There's a new charity hit single coming soon! 59 musical artists from the worlds of rap, hip-hop, pop, rock, musical theatre and country music have been working on a unique collaboration, performing a cover of a song made famous by one of them.

If the diagram below shows how the singers stood in the studio during the recording, can you tell me: What song are they performing, and which member of the group originally performed it?

Snoop Dogg	Dr Dre	Eminem	Dido	Missy Elliott	Doja Cat	Jamie Foxx
Ceelo Green	Will Smith	Fatman Scoop	Wiz Khalifa	Nicki Minaj	André 3000	Blueface
Sam Smith	Joey Fatone	Van Morrison	Michael Buble	Bruce Dickinson	Michael Kiwanuka	Louis Tomlinson
Richard Fairbrass	Benny Andersson	Eric Clapton	Bob Dylan	Marilyn Manson	Fatboy Slim	Harry Belafonte
Philippa Soo	Leslie Odom Jr.	Julie Andrews	Lin-Manuel Miranda	Agnetha Fältskog	Matthew Morrison	Elaine Paige
Alanis Morisette	Mariah Carey	Miley Cyrus	Gloria Estefan	Janet Jackson	Lady Gaga	Tina Turner
Christina Perri	Kylie Minogue	Gwen Stefani	Sophie Ellis-Bextor	Avril Lavigne	Christina Aguilera	Madonna
Dolly Parton	Tim McGraw	Blake Shelton	Faith Hill	Stephen Stills	Willie Nelson	Gordon Lightfoot
		Mark Ronson	Mick Jagger	Pharrell Williams

^{A note of reassurance: You will not need to spend time inspecting 59 Wikipedia pages to solve this puzzle (although some solvers may need to carry out one or two searches to pinpoint the answer).}

Answer 1

These artists are performing a cover of:

Do-Re-Mi by Julie Andrews from the soundtrack to The Sound of Music.

The reason:

Every artist in the arrangement has one of the syllables in the solmization (I learned a new word today!) of the Western scale: DO, RE, MI, FA, SO, LA, TI. Note: the typical solmization uses SOL instead of SO, but the song clearly uses SO, as in "SO, a needle pulling thread", indicating a rhyme with "SEW". A listing of the artists with syllables highlighted:

Snoop Dogg, Dr Dre, Eminem, Dido, Missy Elliott, Doja Cat, Jamie Foxx
Ceelo Green, Will Smith, Fatman Scoop, Wiz Khalifa, Nicki Minaj, André 3000, Blueface
Sam Smith, Joey Fatone, Van Morrison, Michael Buble, Bruce Dickinson, Michael Kiwanuka, Louis Tomlinson
Richard Fairbrass, Benny Andersson, Eric Clapton, Bob Dylan, Marilyn Manson, Fatboy Slim, Harry Belafonte
Philippa Soo, Leslie Odom Jr., Julie Andrews, Lin-Manuel Miranda, Agnetha Fältskog, Matthew Morrison, Elaine Paige
Alanis Morisette, Mariah Carey, Miley Cyrus, Gloria Estefan, Janet Jackson, Lady Gaga, Tina Turner
Christina Perri, Kylie Minogue, Gwen Stefani, Sophie Ellis-Bextor, Avril Lavigne, Christina Aguilera, Madonna
Dolly Parton, Tim McGraw, Blake Shelton, Faith Hill, Stephen Stills, Willie Nelson, Gordon Lightfoot
Mark Ronson, Mick Jagger, Pharrell Williams

Note:

I feel like there might be another step in here, mostly because Stiv's puzzles almost always have something a bit extra. But there are 12 MIs and only 5 REs, making some sort of covering with sets of the syllables unlikely. Though the first column does have all of the syllables in the correct order, and in fact at the end, it brings us back to DO. Oh, oh, oh.

The next step (added later):

Per @juicifer's comment, it looks like the ordering of the notes in the grid actually corresponds to the sheet music for the song, with DO denoting C.