Black Sabbath, who have been releasing regular announcements regarding singles, album track listings, studio videos and tours, have now announced four summer shows in North America. Tickets for the Live Nation-produced tour will go on sale this Saturday, April 20, at LiveNation.com and Ticketmaster.com.

The album artwork and track listing for 13 — the first new studio album in 35 years from the original Black Sabbath — have now been revealed. In classic Sabbath fashion, the album, which is due out June 11, features eight songs and clocks in at just under 60 minutes.

As the countdown for the June 11 arrival of Black Sabbath's 13 gets closer, the second Jack Osbourne-directed clip of the band at work on the album can now be seen below.

Tony Iommi, who is knee-deep into recording Black's Sabbath's new album, 13, is already looking beyond that project to something new — a riff-based album with Queen guitarist Brian May. The idea behind the project, as reported by RollingStone.com this morning, is that fans would be able "build their own songs" around Iommi's and May's unused material.