Bonnaroo 2013 Begins, Streamed Live

The 2013 Bonnaroo Music & Arts Festival kicked off on Thursday and will host a variety of today's best musical acts.

Over 80,000 people are enjoying the 3-day music festival in Tennessee, which is headlined with impressive acts such as Paul McCartney and famed rapper Kendrick Lamar.

Other notable acts include Passion Pit, Wu-Tang Clan, Grizzy Bear, Alt, J, The xx, The Lumineers, and Edward Sharpe and the Magnetic Zeros, among many others.

The 12th annual Bonnaroo Music & Arts Festival will run through Sunday, June 16 in Manchester, Tenn.

All performances will be streamed on the official Bonnaroo homepage.

Superfly Productions and Ac Entertainment created the festival in 2002 and it takes place at Great Stage Park on a 700-acre farm. Fans can participate in various activities in tents set up, such as a silent disco and food vendors.

Unfortunately, this year, the Grammy Award-winning group Mumford & Sons was forced to cancel their Bonnaroo performance set for Saturday.

The English group's bassist Ted Dwane underwent emergency surgery on his brain after suffering from a blood clot on Monday, and although the dangerous clot has been treated, the musician is still in recovery.

"Ted has been feeling unwell for a few days, and yesterday he was taken to a hospital to receive emergency treatment," Mumford & Sons posted on their official website on Tuesday.

"The scans revealed a blood clot on the surface of his brain that requires an operation," it continued. "Ted is receiving excellent care and we are being assured that he will recover quickly from surgery."

While the band rescheduled performances in Dallas, The Woodlands, and New Orleans as well as Saturday's festival, the group assured fans that "we have no plans to cancel or postpone any other appearances along this current tour."