American singer-songwriter Melissa Etheridge has separated from her partner of ten years, actress Tammy Lynn Michaels. The 49-year old rock musician filed a document called a Petition for Dissolution of Domestic Partnership with the Los Angeles County Superior Court which will officially end the partnership. Etheridge and Michaels, 35, both iconic gay rights activists in the US, had a commitment ceremony back in 2003 and registered as legal domestic partners in the state of California. [Snip] Etheridge is asking for joint custody of the couple's twins who were born in 2006, after Tammy was artificially inseminated by an anonymous...