Talented young songstress and former The Voice star Christina Grimmie was shot dead as she signed autographs after a concert in Orlando, Florida.
Christina built up a strong following online by posting videos of her singing on YouTube before entering series 6 of the US version of the Voice, where she was mentored by Adam Levine and received support from Justin Bieber and Lil Wayne.
Christina posted a video message on her Twitter account just hours before the fatal incident, letting fans know that she would be performing in Orlando that evening.
ORLANDO!! Come out to the show tonight at the Plaza Live! Starts at 7:30!? pic.twitter.com/0D4mNupCTi
-- Christina Grimmie (@TheRealGrimmie) June 10, 2016
Clips of Christina's last performance have also surfaced online, showing the young singer in her element on stage.
-- Fer RIP zeldaxlove64 (@jaureguixmccann) June 11, 2016
-- Bryan | today!!! (@camilasviews) June 11, 2016
The band performing with Christina on the night of the attack, Before You Exit, posted a moving tribute - describing their late friend as "a constant beam of light and energy".
-- Before You Exit? (@beforeyouexit) June 11, 2016
Her former mentor Adam Levine also shared a picture of the pair.
Other famous fans and friends shared in their shock and sorrow on Twitter.
#RIPChristina ?? my thoughts and prayers are with her loved ones..
-- Demi Lovato (@ddlovato) June 11, 2016
Have just gotten access to service and I'm speechless. I need some time to collect my thoughts. #RIPChristina you beautiful thing.
-- h (@halsey) June 11, 2016
-- James McVey (@TheVampsJames) June 11, 2016
#RIPChristina i can't believe it. Absolutely every last bit of my love. Such an inspiration to me and so many ?
-- Shawn Mendes (@ShawnMendes) June 11, 2016
-- Riley McDonough? (@rileymcdonough) June 11, 2016
Christina Grimmie... You were so talented. I hope you find peace. You didn't deserve this. #RIPChristina
-- Abigail Breslin (@yoabbaabba) June 11, 2016
I Cant believe there are people in the world who could do such an evil, senseless act. Love & prayers to the Grimmie family. #RIPChristina
-- Lucy Hale (@lucyhale) June 11, 2016
Many members of the YouTube community have also flocked to Twitter to remember the immensely talented young singer.
This is so outrageously sad. I have no words. #RIPChristina
-- Jenna Mourey/Marbles (@Jenna_Marbles) June 11, 2016
-- felix kjellberg (@pewdiepie) June 11, 2016
this world is so messed up. she was taken way too soon I can't believe this, prayers are with her friends and family #RIPChristina
-- Rachel Levin (@rclbeauty101) June 11, 2016
My heart is absolutely broken. You were one of the first people that ever inspired me musically. I can't believe this ? #RIPchristina
-- Bethan Mary Leadley (@musicalbethan) June 11, 2016
Just seen the news about Christina Grimmie...heartbreaking #RIPChristina
-- Tanya Burr (@TanyaBurr) June 11, 2016
Such a sad reality that this kind of stuff can happen. How quick life can be taken. My thoughts are with her friends & fam. #RIPChristina =(
-- Joey Graceffa (@JoeyGraceffa) June 11, 2016