michael with prince+paris,queen_gina

Michael Jackson's children refused to believe their dad died of a 心 attack -- because MJ used to RAVE that Dr. Murray was the BEST doctor on EARTH ... TMZ has learned.


MJ's former nanny, Grace Rwaramba, spoke with LAPD investigators in the months after Michael died ... and explained how Murray became a "regular" around the house when the singer lived in Vegas ... coming 由 at least two times a week.

Grace told investigators Michael would constantly brag about Murray in front of the kids -- and that's why after he died, the kids would say, "There's no way daddy could have died of a heart...

She's lookin for a job and a finer place to stay,
She's lookin for the hope in the empty promising,
She's workin two jobs, keepin alive,
She works in a restaurant night and day
She waits her life away
She wipes the tears away

She cries inside every time she feels this way,
And she’s dying inside every time her baby cries, no

Keepin your head up to the sky,
Keepin your mind just stay alive,
Keepin your wings so we can fly,
(Keep your head up tonight)

Keepin your head up to the sky,
And we can just rise up tell me now,
Gimme your wings so we can fly,

Giving up the life of the birds in the trees
And we’re...