2 festival goers have died and many more hospitalized at Defcon in Sydney, Australia.
Many artists, including Ariana Grande, have posted to social media about Mac Miller's death.
Young rapper died of apparent drug overdose.
The infamous drug dealer of Demi Lovato talks about what happened the night of her overdose.
Demi Lovato leaves a heartwarming message to her fans on social media.
Singer Demi Lovato was rushed to the hospital for an apparent drug overdose.