According to Entertainment Tonight, Houston was approaching the podium to speak during the memorial service when Leolah yelled, "How dare you? How dare you?" That's when Tyler Perry stepped in and helped escort her outside the St. James United Methodist Church in Alpharetta, Ga.
After the incident, Leolah spoke with reporters and continued to attack Houston, even going so far as to say that she was involved in Bobbi Kristina's death.
"Whitney will haunt Pat Houston from the grave. Pat, it's not over. It has just begun," Leolah said in a video posted by NBC affiliate 11 Alive. "I say that because I have information. I have evidence. I have knowledge of who Pat really is."
"Use your brains. This is not something that just happens," Leolah said of Bobbi Kristina's death, which eerily echoed that of her mother Whitney Houston in 2012. "This is going to be connected. Again, I'm angry at [Bobbi Kristina's boyfriend Nick Gordon]. I'm angry at what happened to my niece. But Pat has something to do with it."
Watch Leolah's full interview below.