John Travolta:
"My dearest Olivia, you made all of our lives so much better. Your impact was incredible. 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:
"Another angelic voice has been added to the Heavenly Choir. Not only was Olivia a dear friend, but one of the nicest people I had the pleasure of recording and performing with. I will most definitely miss her. She now rests in the arms of the Heavenly Father 
"
Richard Marx:
"My heart is broken. Rest now, sweet friend. You were as kind and loving a person as there’s ever been. I’ll miss you every day. 
"
Julie Hough:
"Like so many, Olivia has always been my hero. Discovering her magnetic energy as an artist and actress came first but it was her heart that truly captured mine.
Forever an icon and legend!"
Rick Springfield:
"Sweet Olivia has gone home. She was a beautiful soul and I know of no one who didn't love her or know what a great humanitarian she was. The world is out of balance when we lose these magnificent people. God speed Livvy. We will all meet again."
Sarah Bareilles:
"Olivia Newton-John was one of my biggest influences and greatest musical loves. Rest In Peace you extraordinary sweet, kind, loving heart. You were and are a gift."
Randal Kleiser, director of Grease:
"I’m Heartbroken. She was one of a kind, and so very kind. For over four decades of our friendship she exuded nothing but love to everyone she met. Olivia was exactly the way you imagined her. I will miss her forever.”
Robin Roberts:
"Very sad news. Great admiration for how she bravely faced breast cancer. Condolences to her loving family and friends. 
"
Antonio Banderas:
"Rest in peace, Olivia Newton-John. Deepest condolences to her family and loved ones."
Piers Morgan:
"So sad to hear the fabulously gutsy, warm & talented Olivia Newton-John has died. At an auction of her Grease memorabilia in LA three years ago, she told me her favourite song from the movie was Hopelessly Devoted To You. Great song, great film, great lady. RIP."
Viola Davis:
"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. 
"
