Nah, Mariah and Janet wrote their shyt. More specifically their early stuff. It’s another reason Mariah be on folks necks
co-wrote
which is my point
how many songs do they have where they wrote the song by themselves?
do you really think jam and lewis needed help "co writing?"
i'd question what and how much they did (especially janet and madonna [who you didn't mention])
i wouldn't be surprised if beyonce (who i'm not a big fan of) at times did as much as they did
for example, some people believe vocal arrangements is part of the songwriting process
there's no way to actually prove what any of them really did (see miseducation of lauryn hill)
can lauryn hill do that again and why hasn't she tried (yet)
?
my barometer has always been "what did they do by themselves?"
and i always use la and babyface as an example
look at how many songs babyface wrote and produced WITHOUT la reid
then look up how many songs la reid did WITHOUT babyface
that tells me who was doing the heavy lifting in the "co writing" process.