Star of The Voice US, Christina Grimmie, has been shot dead at a concert in Florida.
It happened while she was signing autographs after the gig in Orlando on Friday night. She died later in hospital.
There's reports her attacker then turned the gun on himself.
Police in Florida say the gunman "travelled to Orlando to commit this crime" but did not appear to know her personally.
In 2014, she was a contestant on US TV programme The Voice.
There are no words. We lost a beautiful soul with an amazing voice. Our hearts go out to the friends, fans and family of @TheRealGrimmie.
— The Voice (@NBCTheVoice) June 11, 2016
We are heartbroken. @TheRealGrimmie is a loved member of our family. Our thoughts are with her and her family. #PrayForChristina
— The Voice (@NBCTheVoice) June 11, 2016
Tributes are pouring in:
Praying so hard for Christina Grimmie ðŸ™ðŸ¼ðŸ™ðŸ¼ðŸ™ðŸ¼ please pray for her
— Demi Lovato (@ddlovato) June 11, 2016
Devastating Tragedy @TheRealGrimmie
— ADAM LAMBERT (@adamlambert) June 11, 2016
So shocked, saddened & angry to hear about Christina Grimmie. What a tragic loss 😔 my thoughts are with her family, friends and fans â¤ï¸
— Zoë (@Zoella) June 11, 2016
i can't believe the news about @therealgrimmie. im devastated this could ever happen to anyone. sending love & prayers to her family 💔
— christina perri (@christinaperri) June 11, 2016
This is such a terrible tragedy 😔Thoughts and prayers go out to all the family 🙠G @TheRealGrimmie
— the script (@thescript) June 11, 2016
Such sad news about @TheRealGrimmie ... What is wrong with the world?! #RIPChristina
— Nathan Sykes (@NathanSykes) June 11, 2016
