T-Pain stopped appearing on DJ Khaled albums all the way back in 2013 -- he's calling it an act of betrayal, after he propelled Mr. "We The Best" to platinum status!!!
On the latest episode of "Club Shay Shay", Shannon Sharpe simply asked T-Pain what's the one lesson he learned as he approaches his debut album's 20th anniversary ... a0nd T-Pain immediately brought up DJ Khaled.
T-Pain says the most invaluable lesson he learned was that nobody is your brother -- especially those who always tell you they are!