Singer Aretha Franklin's funeral took place over the weekend and Ariana Grande was one of the many stars who paid tribute. She sang a rendition of "Natural Woman".
After her performance she was joined onstage by Bishop Charles H. Ellis III, who led Franklin's funeral.
People noticed that while talking to Grande he put his arm around her and his hands ended up near the side of her breast.
People said that Grande looked uncomfortable.
When asked about the incident, the bishop apologised in an interview with the Associated Press.
It would never be my intention to touch any woman's breast. ... I don't know, I guess I put my arm around her.
"Maybe I crossed the border, maybe I was too friendly or familiar but, again, I apologise."
The bishop said he hugged everyone. He said: "I hugged all the female artists and the male artists.
"Everybody that was up, I shook their hands and hugged them. That's what we are all about in the church. We are all about love.
"The last thing I want to do is to be a distraction to this day. This is all about Aretha Franklin."
He also apologised for saying: "When I saw Ariana Grande on the program, I thought that was a new something at Taco Bell."
"I personally and sincerely apologize to Ariana and to her fans and to the whole Hispanic community," Ellis said.
"When you’re doing a program for nine hours you try to keep it lively, you try to insert some jokes here and there."
Grande has not made any comments on the incident.