Katherine Jackson has revealed that she "hasn't been doing so well" since her son, Michael Jackson, died last year.

In a new interview, Katherine says that it's been an incredibly hard year and she is an emotional wreck.

The video is thought to have been made before the King of Pop's first anniversary and she said: "Not a day goes by that I don't think about my son."

Katherine Jackson is currently promoting her new book 'Never Can Say Goodbye' and, according TMZ, the interview is parter of a big documentary about Jackson's life.

Watch the clip here!

Check out our tribute to Michael Jackson...