Emmylou Harris performs as part of "A Celebration of Kate McGarrigle," at London's Southbank Centre on Saturday. Alongside Harris, other artists paying tribute to the singer-songwriter, who passed away earlier this year, include Lisa Hannigan, Lily Lanken, Slyvain Lanken, Anna McGarrigle, Jenni Muldhaur, Kami Thompson, Linda Thompson, Richard Thompson, Teddy Thompson, Martha Wainwright, and Rufus Wainwright. The tribute is a part of Richard Thompson's Meltdown Festival, which begins tonight and runs through the June 21.

Many of the performers, including Harris, Richard Thompson, McGarrigle, and the Wainwright siblings, were at the sixth annual MOJO Honours List ceremony last night in London, where The Low Anthem picked up the award for Breakthrough Act of the Year. "The Low Anthem are a classic American band in the making," says MOJO Editor-in-Chief Phil Alexander. Their album Oh My God Charlie Darwin "fired up the MOJO readers' imagination with its mix of Dylan-meets-Waits Americana," says Alexander. For complete coverage of last night's event, including more photos from the red carpet, head to mojo4music.com.

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Tony Allen, fresh off his Thursday night appearance on Late Night with Jimmy Fallon, sitting in with the show's house band, The Roots, kicks off his North American tour this weekend with two free festival performances. On Saturday, he helps kicks off the Luminato Festival at Queens Park in Toronto, Canada, in which his performance is part of the evening's theme of "An African Prom." On Sunday, Allen finishes off the Marquette Waterfront Festival at Yahara Place Park in Madison, Wisconsin.

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Timothy Andres contributes a new piece for two violins and piano, Clamber Music, as part of the 50th birthday celebration of Wendy Sharp, Yale University's legendary violin professor, which takes place Sunday at Yale's Sprague Hall. In addition to Andres's piano, he will be accompanied by Sharp and Tema Watstein on violin.

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Continuing to tour in support of their recent Nonesuch release, Brothers, The Black Keys return to the Bonnaroo Music & Arts Festival for the first time since 2007 tonight. Their midnight performance at That Tent also marks their first late night set at the festival.

The Black Keys performed two sold-out shows at First Ave. in Minneapolis earlier this week that led the Star Tribune to rave: "Best. Black Keys show. Ever. Seriously." Reviewer Chris Riemenschneider explains: "As someone who’s been cheering on Akron’s finest since Thickfreakness, I had a lot of pride and even greater awe watching the duo take it to another level ... Their muscular 95-minute performance was just plain masterful." Read the full concert review at startribune.com. Riemenschneider had recently spoken with The Black Keys' Dan Auerbach, in which the singer-songwriter-guitarist says of the new album: "We've grown up." You'll find that article at startribune.com  as well.

You can watch the band's recent performance on the Late Show with David Letterman now on cbs.com. And there's a new performance of "Tighten Up" on Spinners' "The Interface" at spinner.com.

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Also at Bonnaroo today are the Carolina Chocolate Drops, who are playing two sets, at That Tent and Sonic Stage, as part of their tour in support of the recently released Genuine Negro Jig. Their tour continues on Saturday with a performance at the 40 Watt Club in Athens, Georgia, with Solstice Sisters supporting. On Sunday, the Drops close out the Spoleto Festival in Charleston, South Carolina, playing at Middleton Place.

In advance of their Spoleto appearance, the band spoke with the Charleston City Paper's Erica Jackson for a feature article about their music. "Calling the Carolina Chocolate Drops an 'old-time string band' might not be the most accurate description of the trio," writes Jackson. "After all, they're not that old. And though the music they play is deeply rooted in the traditional string music of the Carolina mountains, they put a subtly modern spin on it. So we're coining a new term, just for the Drops: 'young-time string band.'" Read the complete article at charlestoncitypaper.com.

There's also an interview with band member Dom Flemons in the Houston Chronicle previewing the trio's performance in that city next week. You'll find it at chron.com.

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Shawn Colvin continues her tour with two Saturday night performances at the Old Town School of Folk Music in Chicago with special guest Nicholas Barron.

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Philip Glass and choreographer Lucinda Childs reunite to share their ideas and experiences on their creative collaboration, Dance, in "Collaboration & Invention: A Conversation with Lucinda Childs & Philip Glass," a free event on Sunday at the Yale University Art Gallery as part of the International Festival of Arts & Ideas.  Following the session is an intimate solo piano performance from Glass at Sprague Memorial Hall, also as part of the festival.

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The Asian leg of Pat Metheny's tour in support of his latest Nonesuch release, Orchestrion, comes to a close with consecutive shows at Tokyo's Sumida Triphony Hall, one tonight and a second set on Saturday. Metheny then joins the Pat Metheny Group for its Song Book Tour of Europe through July. He return to the States for more Orchestrion dates in October.

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Fernando Otero performs at Helferei Grossmünster in Zurich, Switzerland on Saturday. Accompanying him are Emil Yakovlev on violin and Gabriela Bergallo on vocals.

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The Nicholas Payton Quintet performs Saturday at the Miniaci Center for the Performing Arts in Ft. Lauderdale, Florida, as part of the South Florida JAZZ 2010 Concert Series.

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Joining The Black Keys and Carolina Chocolate Drops at Bonnaroo are Punch Brothers, who perform two sets today: at That Tent and Sonic Stage; both performances come directly before the Carolina Chocolate Drops. The Punch Brothers follow up on Saturday with a performance at the Ravinia Festival Pavilion in Highland Park, Illinois, the first in a line of several shows supporting Steve Martin and the Steep Canyon Rangers. The group closes out the weekend with a Sunday concert, also in support of Martin, at the State Theatre in Minneapolis, Minnesota. As reported yesterday in the Nonesuch Journal, the band will perform on The Tonight Show with Jay Leno next Thursday, June 17, following the Tuesday release of their new album, Antifogmatic.

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James Farm, the new collaborative project from Joshua Redman, pianist, Aaron Parks, bassist Matt Penman, and drummer Eric Harland, performs at the Herbst Theatre in San Francisco on Saturday as part of the 2010 SFJAZZ Spring Season. The collective continues touring the US and Canada throughout the month. 

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The Tony Awards are this weekend, and Stephen Sondheim's A Little Night Music is up for four awards: Best Revival of a Musical, Best Performance by a Leading Actress in a Musical for Catherine Zeta-Jones, Best Performance by a Featured Actress in a Musical for Angela Lansbury, and Best Sound Design of a Musical. Tune in to the awards ceremony Sunday night on CBS starting at 8 PM ET.

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In the first Celebrate Brooklyn! show of the season, following its Opening Night Gala earlier this week, Allen Toussaint performs a free set with Davell Crawford at the Prospect Park Bandshell in Brooklyn Saturday night. As the summer progresses, the festival will feature performances from The Low Anthem and members of the original Buena Vista Social Club.