Today's edition features news and tour information about John Mayer [ tickets ], Stone Temple Pilots [ tickets ], Erykah Badu [ tickets ], Herbie Hancock [ tickets ] and Emmylou Harris [ tickets ].

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John Mayer has announced dates for a summer tour with openers Colbie Caillat and Brett Dennen as he continues to support last year's "Continuum." The singer/songwriter's outing will kick off July 2 with an appearance at Milwaukee's Summerfest and travel to 21 cities through early August.

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Stone Temple Pilots' previously announced handful of summer concert dates have turned into a full-blown reunion tour spanning 65 cities across North America. The grunge-rockers announced the trek yesterday Monday at an exclusive launch event in Los Angeles, during which they performed together publicly for the first time in nearly six years. The initial round of dates is set to kick off May 17 will visit a variety of venues and festivals across the US and Canada through the end of August.

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Neo-soul singer Erykah Badu has mapped out a six-week North American tour to support her latest release, "New Amerykah, Pt. One: 4th World War." The Roots will join Badu on the majority of the outing, which is set to launch May 4 in Detroit. The performers will visit US cities from coast to coast, as well as a few Canadian provinces.

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Jazz visionary Herbie Hancock will launch an international tour next month to support his latest Grammy-winning album, "River: The Joni Letters." The keyboardist/composer will kick things off May 23 at the Sonoma, CA, International Jazz Festival and play gigs across the US and into Canada through mid-August.

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Country/bluegrass veteran Emmylou Harris is gearing up for the release of her new studio album with a run of dates across North America. Harris will kick things off May 23 in Monterey, CA, and travel to the East Coast and back through July. Gigs include a two-night stand in New York City and stops in the Canadian cities of Toronto and Vancouver. In the midst of the run, Harris will deliver her next studio album, titled "All I Intended to Be," which is due in stores June 10.