Sister claims Jackson's sinister entourage got him hooked on drugs.
Reporter for London Daily Mail says MJ's sister was 'very candid.'
Gary Busey, Jose Canseco, Meat Loaf are among other contestants who will appear on reality show's 11th season.
'It's a bit too much for me right now,' MJ's sister says, but loves the global fan response.
Michael Jackson's big sister bouncing back after unhappy marriage, family troubles.
La Toya, Rebbie and Janet Jackson spoke at Nokia Theatre on Tuesday.
Older brother says family planned military-style intervention with Michael.