Over the years, has shared her struggles and successes surrounding her sobriety, weight loss and other personal moments.

“I got sober,” the former Fashion Police host exclusively told Us Weekly in May 2021. “I replaced drugs and alcohol with food, my body metabolized differently. Once I got sober and I gained weight uncontrollably, it was insane. [People] kept telling me, ‘You should do the [gastric sleeve] surgery.’ I was so against it. … I thought the surgery was a cop-out and that it was like cheating. That couldn’t be further from the truth. What the surgery did was give me a fighting chance.”

The Masked Singer alum previously revealed in August 2020 that she had lost 85 pounds after having the procedure two years earlier.

“I lost, like, I want to say 35 pounds, 40 pounds, and then I stopped losing weight,” she told Us. “I just stopped because I didn’t listen to what they said. I just thought it was going to be a quick fix. I’d be done. I’d be skinny. [I thought I] didn’t have to work out or do anything. I could not have been more wrong. You have to do every single thing that they tell you to do when you do the surgery, or it doesn’t work.”

Along with her wellness journey, Osbourne also struggled with addiction and her sobriety. After several years of being clean, she later relapsed while in quarantine throughout the coronavirus pandemic, which began in early 2020. She revealed in October 2021 that she was sober again.

Scroll below to see the Osbourne's ups and downs throughout the years:

After her 2009 stint on Dancing With the Stars, Osbourne lost nearly 20 pounds thanks to the daily cardio sessions and a change to her diet.

"I was called fat and ugly in the press almost my entire life," she recalled to Shape magazine one year later of her weight loss journey. "I understand that being judged by others comes with the territory, but it broke my heart and ruined my self-esteem. It sets you up to hate yourself in a huge way. I was so angry about the things people said about me.”

 When the ABC competition had ended, she later struggled with her weight and workout motivation, telling the magazine, “I didn't like it one bit. I thought, 'Kelly, you've come this far, let's see what you can really do!’ I would look at myself and think, ‘Ugh!' To get to the gym, when you already don't like yourself, is really hard."

The reality TV alum opened up being diagnosed with Lyme disease in her 2018 memoir, There Is No F—king Secret. She wrote at the time, “The doctors kept changing my prescription, trying to get the dosage right, and it turned me into a zombie. You know in movies where a mental patient sits in a rocking chair in a cardigan and nightgown and stares at a wall all day? That was me.”

After her initial diagnosis, she underwent stem cell therapy treatment, writing, “I’ve kept quiet about my Lyme disease, not only for fear of pharmaceutical companies coming after me because of the cure I found in Germany but also because it seems like the trendy disease to have right now, and I’m tired of seeing sad celebrities play the victim on the cover of weekly mags. Since I know firsthand how awfully debilitating it is, I know who really has it and who is just trying to prolong their 15 minutes. I don’t understand how anyone could think that the life you have to live with Lyme disease is glamorous.”

While marking one year of sobriety, Osbourne thanked her family for their support, sharing via Instagram, “I have spend the past year truly working on my mind body and soul! I had to take a step out of the public eye away from work and give myself a chance to heal and figure out who the fuck I really am without a camera in my face. … Thank you to my Mum and Dad for never giving up on me. I love my family with all my heart. Thank you to the friends who have walked the path of sobriety with me I could not have done this with out there love and support. I can’t believe It’s been a year!!! I still don’t know who the f—k I am or what the f—k I want but I can whole heartedly confess that I’m finally at peace with myself and truly starting to understand what true happiness is. I’m sorry if I let anyone down it was just time for me to work on me!”

and Ozzy Osbourne’s daughter opened up about undergoing gastric sleeve surgery two years prior.

“I had really bad TMJ. One of the things they did to stop it was they gave me injections in my jaw. It kinda made my jaw look skinnier. That’s when people started to notice that I had really lost weight because it changed the shape of everything,”  Kelly said during an episode of the “Hollywood Raw with Dax Holt and Adam Glyn” podcast at the time. “I found out It’s called buckle fat. It changed everything on my face! How the f–k did I not know about this sooner?”

She continued, “I don’t give a f–k what anyone has to say. I did it, I’m proud of it, they can suck s–t. I did the gastric sleeve. All it does is change the shape of your stomach. I got that almost two years ago. I will never, ever, ever lie about it ever. It is the best thing I have ever done.”

The England native showed her impressive weight loss while celebrating her birthday. Months earlier, she shared a selfie of her weight loss progress, writing, “Today I’m feeling #Gucci.” At the time, a friend commented that she “lost a lot of weight,” to which Kelly replied, “That’s right mamma Mai I lost 85lbs since I last saw you. Can you believe it?”

After nearly four years sober, the TV host relapsed amid the coronavirus pandemic. “This is a little hard for me to talk about, but I’ve always promised you that I will always be honest with you about where I’m at and what’s going on in my road to recovery,” she explained via her Instagram Story. “I relapsed. Not proud of it. But I am back on track.”

During a Red Table Talk appearance, the designer opened about her addiction struggles, telling the hosts, “I had a really bad case of tonsillitis. They ended up having to give me some crazy surgery and then after that they gave me Vicodin and that was all I needed. I went from having every voice in my head being like, ‘You’re fat, you’re ugly, you’re not good enough, no one likes you, you don’t deserve this, people only like you for who your parents are,’ then all of a sudden every single voice was silent. It felt like life gave me a hug.”

“Today marks my 37th birthday and I’m 5 months sober!!! I am filled with so much gratitude it’s almost overwhelming! 💜,” she captioned a birthday selfie via Instagram.

Osbourne announced that she was expecting her first child via Instagram, sharing sonogram photos. She captioned her post: “I know that I have been very quiet these past few months so I thought I would share with you all as to why… I am over the moon to announce that I am going to be a Mumma. To say that I am happy does not quite cut it. I am ecstatic!”

Weeks after Kelly announced she is expecting her first child, she opened up about her latest sobriety milestone.

“What a difference a year can make! If you would have told me 365 days ago that I would be sober, happy, and about to be a mumma I would have laughed in your face,” Kelly wrote via Instagram, revealing she has been sober for one year. “Life is truly amazing when you do the work. Thank you to everyone that has supported me on this journey. I love you all so much!!!!!!!”

She gave birth to son Sidney the following November.

Osbourne's boyfriend, Wilson, proposed backstage at her dad's last Black Sabbath concert.

"Kelly, you know I love you more than anything in the world,” Wilson said at the time. “Nothing would make me happier than spending the rest of my life with you. In front of your family and all of our friends, Kelly, will you marry me?”