With his daughter, Bobbi Kristina Brown, remaining comatose after having been transferred to hospice care last month, R&B singer Bobby Brown soldiered on at an Independence Day concert.

A video of Brown, 46, opening for Mint Condition at the Affordable Old School Concert series at the Wolf Creek Amphitheater in Atlanta, shows him distractedly stopping and starting songs during his reportedly 30-minute set. While never mentioning his daughter's condition, he tells the audience, "I feel like I've been up here for, like, two hours," and assures them, "Trust me, I'm not gonna do anything that I don't do."

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He later tells the crowd, "I feel y'all gotta be forgiving [expletive] right now. You know I'm in a different zone right now, so y'all going to have to excuse me. . . . "

People magazine said Brown, who performed his songs including "My Prerogative," frequently left the stage to hug family members and friends.

His state of mind has been "in a nutshell, not good. Not good," his former New Edition bandmate Johnny Gill told "Entertainment Tonight" in an interview posted on June 26, adding, "We just had a conversation yesterday. I wouldn't wish this on my worst enemy."

Bobbi Kristina Brown, 22, the only child of Bobby Brown and the late pop star Whitney Houston, was discovered facedown and unresponsive on Jan. 31 in a bathtub at her town house in Roswell, Georgia, a suburb of Atlanta. She was taken by ambulance to North Fulton Hospital there, later moved to Emory University Hospital in Atlanta and eventually to a rehabilitation facility nearby. On June 24, her co-guardians, Bobby Brown and Pat Houston, Whitney Houston's sister-in-law, said in a statement that she had been moved into hospice care.

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Also recently, Bobbi Kristina's aunt, Leolah Brown, railed on Facebook about reports of someone seeking to sell hospice photos of her niece. "Entertainment Tonight" on Friday said it had "declined the unseemly offer," which carried an asking price "in excess of $100,000."