The co-headlining tour will be called "The Best of Both Worlds" and will feature full sets from both Cyrus and Metallica. To commemorate the historic partnership, Metallica's upcoming album is to feature a bonus track that features Cyrus on the touching father/ daughter power ballad version of 'achey, breaky heart' that the band recorded last month at a bay area mall, to test fan reaction.

When Hannah fans heard news of this announcement, concert tickets immediately sold out, despite not being on sale yet. The two have also teamed up for a merch line. Commemorative Hannah/ Metallica lip gloss went on sale today in K Marts & Dollar Trees across the country. With appealing new flavors like Master of Profits, And Justice For Lars, tween goth favorite Blackened and St Equity and old favorites like Hannah Bubbah Gum, this merger is sure to generate loads of cash for these musicians turned business men! - more on this story

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