Amy Winehouse died on Jul. 23 in her London apartment.  The singer was just 27 years old.

London authorities were called at 3 p.m. local time to her address.  However, Winehouse had already passed away upon their arrival.

We are deeply saddened at the sudden loss of such a gifted musician, artist and performer. Our prayers go out to Amy's family, friends and fans at this difficult time, her record label Universal said in a statement.

Currently, the cause of death is officially unknown, although multiple UK media reports claim that sources say she was on a drugs and alcohol binge before her death.

Although the singer, who won 5 Grammy Awards with her album Back to Black, struggle publicly with her drugs and alcohol addictions, her death still comes as a shock to her fans and colleagues in the entertainment world.

U made a MAJAH impression on this industry and throughout the world, in such a short space of time...too short! tweeted Rihanna, another young and talented musician.

I'm so sad to hear the horrible news of Amy Winehouse's death. I'm so happy I knew you Amy...Rest Well. Gone Too Soon...we'll miss you!! tweeted Usher.

i cant even breath right my now im crying so hard i just lost 1 of my best friends. i love you forever Amy & will never forget the real you! tweeted her friend Kelly Osbourne.

Both amy winehouse and my mams friend died of drugs, I hope this has learnt many people not to do drugs!, tweeted a fan.