"I want to give blessings to my ex-wife Whitney Houston. I love you," Brown said at the concert.
Brown appeared briefly at Houston's funeral earlier in the day but ended up walking out. He said later that security had asked him and his children to move several times.
Brown eventually walked to Houston's casket, touched it and left the church.
"They wanted them to move, and I think they didn't make proper accommodations for him to move, and so he was asked to leave, and that was a very difficult moment for all of us. I tried to get him to stay, but they asked him to get up to go and wouldn't make room for him," said the Rev. Jesse Jackson, who also attended Houston's funeral service in Newark, N.J.
Brown issued a statement saying "in light of the events, I gave a kiss to the casket of my ex-wife and departed as I refused to create a scene. This was a day to honor Whitney"
Houston died last Saturday in her hotel room at the Beverly Hilton hotel on the eve of the Grammys at the age of 48. A cause of death has yet to be determined pending toxicology reports which could take weeks.
Her death marked the end of a life that was marked by stunning career achievements and a public battle with drugs.
We can no longer offer video clips from Whitney Houston's funeral service as the Houston family only granted permission for 24 hours.