The Jacksons can ''feel the sorrow'' performing their old songs without Michael.
The brothers, Marlon, Jermaine, Tito and Jackie - who alongside their late sibling Michael were known as The Jackson 5 - are preparing to tour for the first time since his passing in 2009, and can still feel his spirit in their songs.
Tito said: ''There's certain songs that make you feel the sorrow.
''Then again, there are other songs that bring so much joy and happiness, such as 'ABC' and 'I Want You Back' and the up-tempo stuff like 'This Place Hotel.'
''I just imagine how he used to walk and spin and do all these things. You can feel his presence here.''
Michael had left the group in 1984 after their 'Victory' album, after which they only made one one more album, 1989's '2300 Jackson Street'.
Jermaine said he's found rehearsals hard without Michael there to advise them, saying: ''The brothers don't know this, but I've broken down several times and cried during rehearsals.
''I'm so used to Michael being on the right and then Marlon, Jackie, on and on. It's just something we never get used to.''
Michael died of acute Propofol intoxication in June 2009, aged 50. His personal physician, Dr. Conrad Murray was later charged with involuntary manslaughter in connection with his death.