Grooveshark is dead. Here’s how to move on.
UPDATE (05/05/15): For the time being, there appears to be a 90% clone up at https://grooveshark.io/. According to BGR: "On Tuesday, I received an email from someone calling himself Shark — an individual connected to Grooveshark who has assembled a team to bring the site back to life. “How can I do this?,” he asks in the email. [...]