It was Grammys night, and the crowd of celebrities in the arena - as well as the millions tuned in at home - were watching the star-studded In Memoriam tribute to the late Ozzy Osbourne.
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But when the camera panned to the rest of the teary-eyed Osbourne clan, there was only one topic on everyone's lips.
Just how strikingly frail Kelly Osbourne appeared as she fought to compose herself beside her brother Jack and mom Sharon, her petite frame trembling.
Dressed in a skintight, sleeveless black gown, her dramatically thin arms drew immediate attention, leaving fans and friends whispering about just how much weight she has lost.
Though she's been open about shedding 85lbs after gastric sleeve surgery in 2018 - and denies using Ozempic - her appearance that evening still left many concerned.
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One source, who saw Kelly at the Clive Davis pre-Grammy party, told the Daily Mail: 'She looks even skinnier in person, it was scary. It just does not look normal. I have known her for years and she has never looked like this before, not even close.'
Dressed in a skintight, sleeveless black gown, her dramatically thin arms drew immediate attention, leaving fans and friends whispering about just how much weight she has lost
Insiders told the Daily Mail that Kelly's weight loss has concerned those who know her
The insider continued, 'The first thing I noticed is how her face looks hollow, making her cheekbones stand out. When she talks it looks different, like weird. She is gorgeous, but being that thin is hard.'
According to the insider, 'everyone was talking about her appearance,' wondering 'how much she weighs or if she was in danger.
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'I don't think God intended people to be that thin,' the source added.
Even those close to Kelly are keeping a watchful eye, with a second source telling the Daily Mail that 'nobody near her is looking to provide an intervention, but people have noticed and are monitoring it.'
'Kelly is definitely not concerned with how she looks and would tell anyone that would bring it up to her to go screw off, but she does get upset over people talking about it,' the source added.
'She is very skinny. She has been working on her weight her entire life and the stress of her dad passing away has been a major struggle to deal with that is taking a toll on her look and health.'
Over the years, the British TV personality has been open about her insecurities around weight, which dates back to her teen years while starring in her family's reality show, The Osbournes.
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'I got pulled into the head of the agency's office and he … gave me a whole speech about how I was too fat for TV and I needed to lose weight, and that if I lost weight, I would look better,' she revealed on The Osbournes podcast last year.
'And he was just saying, "You're not a movie star, but you could be one if you lost weight."'
Kelly Osbourne appeared frail as she fought to compose herself beside her brother Jack and mom Sharon, her petite frame trembling
Over the years, the British TV personality has been open about her insecurities around weight, which dates back to her teen years while starring in her family's reality show, The Osbournes
One source, who saw Kelly at the Clive Davis pre-Grammy party, told the Daily Mail: ' She looks even skinnier in person, it was scary. It just does not look normal. I have known her for years and she has never looked like this before, not even close'
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Since then, Kelly's weight journey has been a rollercoaster.
She underwent gastric sleeve surgery in 2018, calling it 'the best thing I have ever done,' and credited a combination of surgery, strict diet and high-intensity interval training for shedding 85lbs.
But pregnancy added another twist. When she was expecting son Sidney in 2022, Kelly gained around 100lbs and developed gestational diabetes, later admitting she avoided the spotlight because of it.
'She has told people that she got skinnier for her kid. She wants to be around for her kid and play and be with her kid for a long time, and now that she lost her dad, she sees that being something even more important,' our second source said.
'She doesn't want to be the weight she used to be and she is going to do whatever she needs to do to stay skinny.'
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Kelly has repeatedly fended off critics who scrutinize her dramatic transformation, most notably denying Ozempic rumors.
'I know everybody thinks I took Ozempic. I did not take Ozempic. I don't know where that came from. My mom took Ozempic,' she previously told Extra.
Even so, the comparison to her mother Sharon, 73, has only fueled speculation.
The first source noted after the pre‑Grammy party, 'Kelly looks much skinnier than her mom Sharon.'
Sharon, meanwhile, has spoken candidly about her own experience with the drug and warned others about potential side effects.
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Kelly underwent gastric sleeve surgery in 2018, calling it 'the best thing I have ever done,' and credited a combination of surgery, strict diet and high-intensity interval training for shedding 85lbs
Kelly has repeatedly fended off critics who scrutinize her dramatic transformation, most notably denying Ozempic rumors
The former X Factor judge was among the first celebrities to publicly confirm using the diabetes drug, after her dramatically slimmed-down appearance sparked widespread concern.
Though she was initially pleased with the results after starting the medication in December 2022, Sharon later admitted she feared she had taken it too far.
Sharon recently told the Daily Mail that she hasn't regained any of the weight she lost while taking the drug and admitted she's been left feeling 'frustrated' by the lingering effects.
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'I don't think I'll ever be happy with the way I look. But I'm now satisfied. It's taken years for me to say this but I've learned my lesson. This is me. It's finally time to leave well alone,' she said.
Not long after her father's passing in July, Kelly similarly addressed critics who took aim at her slender frame in a video shared to Instagram.
'To the people who keep thinking they're being funny and mean by writing comments like are you ill or get off Ozempic, you don't look right… My dad just died, and I'm doing the best that I can,' she said.
'The only thing I have to live for right now is my family. And I choose to share my content with you and share the happy side of my life not the miserable side of my life. So to all those people, f**k off.'
Even so, those close to her say Kelly's spark and sense of humor haven't dimmed.
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The second source noted, 'It is jarring seeing her, but friends and family still see that she is still her animated and jokey self.
'She loves being a mom and she has a zest for life, so once you start talking to her, her appearance goes away.
'But when you see her at first, you definitely notice the weight loss to be a bit extreme.'
The Daily Mail has reached out to Kelly Osbourne's representatives for comment.