(Just a few small additions and slight differences - maybe we'll be able to complete it)

Samantha the Panther she couldn’t be bothered to move
She said, "If I ran through the jungle, now what would that prove?
Stretched out in the sun where I am I can peacefully laze
I can’t think of any way better for passing the days"

Samantha the panther was having a (wonderful/beautiful) dream
She dreamt of a party and cakes that were covered in cream
(...?) she woke up with a jump and she said, "goodness me,

my birthday's on Friday, I wonder what day this can be?"
(or was it on Thursday and she overslept by an extra day?)

Samantha the panther ...
... asked a blue bird ...

"T'was Monday, I know, when I flew over France,
...
It’s Thursday tomorrow, now leave me in peace
I promised my friends I would meet them in Nice (Greece?)"

Samantha the panther was happy, she’d found out at last
She felt very tired because she’d been running so fast
And after a long drink of milk from a coconut cup
She went back to sleep…. It was Saturday when she woke up!