So, if you’re a musician based in any of the territories listed above – or if you’re based in the U.S. and haven’t gotten around to it yet – head over to this sign-up page and register today. After all, you’ve got nothing to lose and potentially a whole lot to gain!

Lead singer Jennifer Nettles and guitarist/vocalist Kristian Bush extend a personal invitation to you:

Expect to hear all their platinum hits, as well as a sneak peek from new release The Incredible Machine which comes out later this week. Also keep an eye out for special guest appearances from Ronnie Dunn (of Brooks and Dunn) and country vocal quartet Little Big Town.

Sugarland spent some time with director Kenny Ortega this week in preparation for the live stream. The man who directed Michael Jackson (This Is It) also offered up some suggestions for Jennifer and Kristian’s choreography:

This is the third installment of the “Unstaged” series brought to you by YouTube, American Express and Vevo. The online experience kicks off with a pre-show that includes a special interview during which the band answers questions that were tweeted earlier this week. At showtime, fans can also participate by picking from three camera angles (including a new “Front Row” cam) or by voting on what song the duo should play as an encore.

If you miss the stream this evening, tune in for highlights from the show on Sugarland’s channel shortly thereafter.

It seems like just yesterday that Carnegie Hall was abuzz with a sold-out performance that made headlines around the globe. Ninety-six musicians arrived in New York City, from over 30 countries, to perform together after uploading an audition video and then being chosen by the YouTube community to be a part of the exciting event. We are thrilled to invite you to audition for the YouTube Symphony Orchestra 2011.

In addition to the new locale, this “second act” includes another new element: “Mothership,” a musical work from composer Mason Bates. Right now, it’s still missing something: an improvisation provided by you. Take a listen to it here and start planning your contribution.

This time there are two ways to audition, for the classical audition perform the pieces listed on the channel according to instrument. For the opportunity to contribute your own creation, choose the solo improviser—it doesn’t matter if you play trumpet, viola or didgeridoo. If you proceed to the final stages, you will join musicians from around the world in a week-long music summit with Grammy-award-winning conductor Michael Tilson Thomas, who returns to guide the orchestra.

The YouTube Symphony Orchestra 2011 is a collaboration with partners the Sydney Symphony, the London Symphony Orchestra, Berliner Philharmoniker and many other leading institutions of the classical music world. This event is being made possible by Hyundai.

If you have memories to share of this legendary member of the Beatles and his music, upload a video to www.youtube.com/johnlennon and you’ll join a global chorus that includes Aerosmith, Jeff Bridges, Jonas Brothers, Ringo Starr, and YouTube Community members like Goh Nakamura and DJ Mike Relm.

As part of today’s celebration, you may have noticed a special YouTube logo that’s being featured in 24 different countries highlighting the artist’s famous self-portrait. This unique artwork is also part of a birthday video that you can find at www.google.com. It’s the very first time that a YouTube video has been embedded into a one-of-a-kind Google Doodle — read a message from artist who created it here.

“Spread Peace. Imagine Peace.” is how Yoko suggests you celebrate the day, along with sharing your video tribute with the world.

Farm Aid also raises awareness about the Good Food movement, a campaign that encourages people to eat and shop locally by getting food directly from growers at farmers’ markets or though community-supported agriculture.

Enjoy the music and, the next time you pick up some groceries, consider the people involved in the journey from farm to table.

But don’t simply watch -- participate! During tonight’s concert, you can interact with the band and the performance itself by choosing your own camera angle. You can also be part of the show via the "Share Your Suburb" photo project. Since Arcade Fire’s new album is called The Suburbs, they’re encouraging fans to upload pictures of their own leafy neighborhoods, including snapshots of front porches, tree-lined streets and grocery store parking lots -- anything that reflects your hometown. The band will feature their favorite submissions onstage during their live performance, so go ahead and submit your images here.

Viewers will also hear from the group in a special pre-show Q&A interview conducted by Terry Gilliam, based on questions you asked here.

So tune in tonight at 10 p.m. ET to catch these chart-topping Canadians performing live from one of the most legendary venues in NYC. And don’t fret if you miss anything: highlights from the concert will be available on the band’s YouTube channel shortly after the event.

Along with this exclusive 30-minute interview, which is highlighted on our homepage today, you might also want to check out her hit single “California Gurls” and a special behind-the-scenes peek from Lisa Nova, of what ultimately turned out to be a relaxed chat between girls.

Want to kick start your own discussion? Join Katy Perry, President Obama and others by adding Moderator to your channel page.

Well, now she’s putting that day-glo fantasy life on hold to answer your questions:

You have until midnight PT on July 18 to submit a video or text question to Katy’s channel (www.youtube.com/katyperry). Everyone will be able to vote on the questions until July 18, and Katy will answer the most popular in an exclusive Q&A as conducted by YouTube’s own Lisa Nova. We’ll put the interview on the homepage shortly after it’s edited and uploaded to YouTube.

Fire away!

Since its launch, YouTube has pioneered ways for users to get professional music into their videos while respecting copyright -- and generating revenue and promotion for artists, songwriters, and music companies. Through Content ID and a series of unprecedented deals with music labels and publishers, we’ve turned user-made music videos into a business opportunity as well as a form of expression. With Audioswap, we built a library of songs you can drop right into your existing YouTube uploads. And with countless artists, we’ve hosted DIY music-video contests and film festivals.

To be clear, many of the FriendlyMusic tracks are still available for free in Audioswap. What’s new is that the FriendlyMusic store offers you up-front reassurance that specific songs are pre-cleared for your video -- plus the ability to edit those songs in your own video editing tools, at the point of creation. This marks the first time a music company has offered YouTube users a direct license. We’re excited about it and we hope you are too.

Try it out and let us know what you think.

The exclusive webcast will include performances from folks like Jay-Z, Tenacious D, Kings of Leon, Weezer, the Dead Weather, LCD Soundsystem, Jimmy Cliff, The Avett Brothers, Spearhead and Dave Matthews Band. YouTube’s own ukulele queen Julia Nunes kicks the whole thing off on Friday, June 11, at 12:15 p.m. (CDT) / 1:15 p.m. (EDT). Hear her talk about her journey to Bonnaroo:

Check the full schedule along with any last minute updates here, the very same place to tune in for the full webcast from Friday, June 11, through Sunday, June 13. Subscribe to the channel (www.youtube.com/bonnaroo) for the latest videos from the festival, stay tuned to our Tweets (http://twitter.com/youtube), and join the live chat via #bonnaroolive during the event.

Enjoy!

Michele Flannery, Music Community Manager, recently watched “Tighten Up.”

We've also got a few words from our most recent YPP Music partner. You may have heard of them – they're a little band with a viral hit or two and recently made headlines by starting their own indie label. As OK Go's Damian Kulash puts it "YouTube has always been a great match for OK Go - creativity flourishes and we can connect directly with our fans. So when we heard about Musicians Wanted, it was a no-brainer: it sounds great for us. We're honored and excited to be the first applicants. We can't wait to get new videos up on our channel."