Not to mention, fitness guru, who’s 70 lbs lighter, and fitter than ever!

While she’s publicly endured brutal breakups, drug-addiction, and career bombs, Osbourne is no shrinking violet.

But how did she achieve (and maintain!)

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such an extreme physical transformation?

Kelly, c’mon!We gotta know your secret!

And as MTV’s highest rated show to date, we loved it.

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Ripped fishnets, concert tee, and Docs?

Yes c’mon!

Charm bracelet and sequined Care Bears dress?

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The nails, the hair, the makeup, the clothes?

Osbourne was teen fashionista candy on a stick,andon the red carpet.

Constant scrutiny of her weight threw her into a whirlwind of crash dieting, self-loathing, and drug abuse.

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What had begun as prescription opiate use, turned to a dangerous addiction.

She was walking in the shadowy footsteps of her notorious addict father.

This was rock bottom.

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She was in trouble.

Rehab

MTV Newsrevealed Osbourne checked into rehab for the first time when she was 19 years old.

She would check in twice more, and combined with psychiatric therapy, she kicked the habit for good.

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You will be a drug addict until the day you die.

I think about them all the time."

And did she ever.

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Staying busy

If multitasking had a face, it would be Kelly Osbourne.

At 24, and with a renewed sense of purpose, she was crushing it.

And she even returned as herself, once again, on family reality rebootOsbournes: Reloaded.

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She appeared to have it all.

But something was still missing.

She was even was experiencing fat-shaming from other celebs.

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Dancing with the Stars

In 2009, Osbourne joinedDancing With The Starsat age 25.

In what would be a serendipitous partnership, she was paired with professional dancerLouis van Amstel.

He was just the inspiration she needed for that real deal#fitspo.

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After a few months, Osbourne decided to hit the gym.

And how did shereallyfeel about it?

“I was miserable,” she said in aShapeinterview.

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“To get to the gymwhen you already don’t like yourselfis really hard.

So I had to make it fun.

I started wearing cute outfits and putting on a little bit of makeup.

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The 26-year-old style-huntress found success as the beloved and blunt host ofE!

That’s what’s so great about being alive and being on this planet: everybody’s different.”

Osbourne also proved she was able to handle difficulties in life, with newfound emotional strength.

Kelly Osbourne

She would later suffer a 30-second seizure on the set ofFashion Policein March of 2013, according toEntertainment Tonight.

And no, she didn’t do it with juice cleanses, brothy soup or surgery.

I don’t like ‘diet foods’; they make you miserable and don’t fill you up.

Kelly Osbourne

I had to find things I enjoyed eating.

Otherwise, I would never have stuck to the plan."

And as far as her personal learning curve?

So how does this firecracker maintain a healthy lifestyle, long term?

By being real about it.

“But now, when I’m full?

I stop eating!”

As she well knows, 70 lbs won’t just keepthemselvesoff without a little sweat.

And you’ve got the option to bet she was looking hot doing it.

In general, she avoids comparing herself to others, focusing instead on the best version of herself.

And if she’s been craving something like mad (yes, pizza, we see you)?

She’ll enjoy it for breakfast, and eat lighter the rest of the day.

And that bathroom scale?

Working out all by her lonesome?

She always grabs some pals for her workouts.

She has even had “plank-offs” with pro athletes.

“My record is 7 1/2 minutes, and I beat a bloody Olympic silver medalist!”

Need an alternative to hitting the clubs?

Osbourne hula-hoops with Adam Lambert!

We call it #HipHopAnonymous.

Adam Lambert is in it.

We live in the same building, and random people show up.

And maybe we should mention that Beyonce, Pink, and FLOTUS hula, too!According toE!

She proves that true results take time and dedication, and that real change comes from within.

That lasting transformation is possible for any of us.

You just have to know you’re worth it.

After being called ‘cherubic and chubby,’ I’m rocking a bikini!

I feel silly, but I think I’m going to cry."

Uh, more likebadassb***h face, Kelly!