Famous backing singers somehow mess up holding note (8)

I believe the answer is:

supremes

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'famous backing singers' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'somehow mess up holding note' is the wordplay.
'somehow' indicates anagramming the letters.
'holding' indicates putting letters inside.
'note' becomes 're' (as in do-re-mi).
'mess'+'up'='messup'
'messup' anagrammed gives 'supmes'.
'supmes' going around 're' is 'SUPREMES'.

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I've seen this clue in The Independent.

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