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The music and film industry alike is taking to social media to honor the late singer andGreaseactorOlivia Newton-John.

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Almost immediately, her friend and famous co-star John Travolta responded with a short but emotional post.

My dearest Olivia, you made all of our lives so much better.

Your impact was incredible, he wrote alongside a photo of a young Newton-John.

I love you so much.

We will see you down the road and we will all be together again.

Yours from the first moment I saw you and forever!

Your Danny, your John!

Dionne Warwick also mourned the loss of her longtime friend.

Another angelic voice has been added to the Heavenly Choir.

I will most definitely miss her, she wrote on Twitter.

See more tributes below.

I will most definitely miss her.

I never got to meet her, but everyone says she was wonderful- always kind.

Me and my sister watched Xanadu more times than I could count.

I trust she is now in the great Xanadu beyond.

Know that we are forever hopelessly devoted to you, Olivia.

Rest in song and mirth.

Rest In Peace, Olivia Newton-John.

Hers was one of the voices of my childhood.

Deepest condolences to everyone she loved and loved her.

Farewell with love to the legend who will forever be my first crush.

Rest In Peace, Olivia Newton-John.

https://t.co/IDdhwtoiDX

Really sad to hear about the passing of Olivia Newton-John.

My first real crush as a kid.

May she Rest In Peace.

https://t.co/gP10SJWqFZ

I am SO saddened at the news of the passing of Olivia Newton John.

I remember being so star struck when I met her at my first Hollywood gathering for Paramount.

RIP dear, sweet Olivia.pic.twitter.com/4FFgolVQNk

Olivia Newton-John has died.

Heartbroken doesnt even BEGIN to cover it.

I ADORED her.I hate this so much.

She was only 73.What is going on?

!#RIPOliviaNewtonJohn

Oh Sandy https://t.co/05dFIX6JBk

ONJ.

And, I always will.

My deepest condolences to her family and loved ones.

x ONJ4EVERpic.twitter.com/3nE8PVDFLy

One of the most genuinely beautiful souls has left us.

Olivia Newton-John was an amazing artist in every way.

She was a dear friend to me and to all.

Olivia is the definition of the phrase Down to earth.

Such an amazing talent and beautiful soul.

Thank you for sharing your talent and inspiring us all.

pic.twitter.com/Iu9I5ppLC4

Shocked and sadden by the news of the death of Dame Olivia Newton John.

Taken far too early from us after battling breast cancer for over 30 yrs.

A beautiful and kind soul.

May she shine as bright in Heaven as she did on Earth.

And yes, Xanadu is still a stone cold classic song.

RIP xpic.twitter.com/VFfQenPcOM

Oh man!!!

You were my childhood!!

Your talent, poise, beauty!!

Rest in glorious peace.

God bless your family….and thank you for creating eternal memories.

Beautiful & strong, she fought to the end.

My heart goes out to her family & all who love her.

It’s just not fair.