It is difficult to know the answer to this, but there are several possibilities. First, nothing sinister or negative should be assumed about the artists who did not perform on it. In January 1985, when it was recorded, a large number of artists were asked to participate. Many did, but others were unable to clear out the time in their schedules; some were touring, others were recording, and others were not considered well-known enough to be asked. In January 1985, Whitney Houston was not yet famous. She had sung back-up vocals for others, but her own solo album was not yet released. It may be she was not asked to perform, or it may be she had other commitments for her new record company. In either case, her lack of participation is does not mean that she was unwilling or uncaring.
sing
Whitney Houston first started singing in a gospel choir at age 11
"The Star Bangled Banner"
whitney houston
luther van dross
no
no
no
sing
BOTH
Whitney Houston first started singing in a gospel choir at age 11
Whitney Houston & Miriah Carey
7
She sang a medley of Whitney's songs as a tribute.
"The Star Bangled Banner"
No Whitney Houston did not take part in the 'We Are The World' video. Many artists were asked to perform on it, but not all of them were able to clear their schedules to get to the studio and participate.
whitney houston