Feuding Jackson Bros. -- Family War Be Damned ... We're Still Performing!

Nothing brings the Jackson brothers together like a payday -- TMZ has learned, Jermaine, Tito, Marlon, and Jackie still plan to perform a concert together tomorrow night ... despite a war raging between Jermaine and the rest of his siblings.

As we reported, Tito, Marlon, and Jackie have drawn a line in the sand -- aligning themselves with the Michael Jackson estate ... while Randy and Jermaine continue to claim the estate is defrauding the family.

Now, sources close to the brothers tell TMZ, the Jackson Unity concert scheduled for tomorrow at the Mountain Winery in Saratoga, CA will still take place as scheduled.

According to sources, the brothers have decided to put their problems aside for the sake of the fans.