Miley Cyrus' Mom Tish Had Affair With Bret Michaels?

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The reason Miley Cyrus' parents are splitting after 17 years of marriage: Mom Tish had an affair with rocker Bret Michaels, reports the new Us Weekly (on newsstands Wednesday).

When Billy Ray learned of it - as well as at least one other fling - he filed for divorce Oct. 27, sources tell Us Weekly.

Michaels, 47, "became close to the entire family" this past February when he and Miley released the racy duet "Nothing to Lose," an insider tells Us Weekly.

Read the whole story at usmagazine.com