As Bobbi Kristina remains hospitalized
after being found in a bathtub unresponsive on Jan. 31, Robinson talked to ET at the Clive Davis Gala on Saturday about how her grandmother Cissy Houston is holding up.
"She's out of it," he said. "She's really struggling with all of this."
Robinson, Jamie Foxx and Jordin Sparks are just a few of the many celebrities who are praying for the family at this time.
"It's such a tragic situation," Robinson said.
Three years ago at the Clive Davis Gala, Robinson spoke about Bobbi Kristina's mother Whitney Houston after she passed away on Feb. 11, 2012 of an accidental drowning in a hotel bathtub in Los Angeles.
At the time, he told CNN, "I know that she's going to be remembered well. I just hope that, you know, people think of the positive things about her and not too much is played upon about her problems, you know, because everybody has problems."
A vigil for Whitney Houston's daughter will be held tonight with friends of the family including Tyler Perry in attendance.