Melissa Etheridge and Tammy Lynn Michaels are at odds over ... well, what are they NOT at odds over would be a better question. The longtime lovebirds are engaged in a full-scale legal war surrounding their former union.
The legality of which is currently in question.
According to legal papers, the Grammy-winning singer claims she's battling Tammy over child custody (the pair has two daughters), visitation, child support, spousal support, division of property and attorney's fees.
Short story: Some lawyers are billing a lot of hours!
Perhaps most significantly, Melissa (now reportedly dating Tammy's BFF Linda Wallem) says they were never actually, legally, married, and that a non-binding commitment ceremony entitles Tammy to ... well, a lot less than a marriage.
Tammy says they were married. How there's confusion about that, we have no idea, but clearly these two don't see eye to eye on many things lately.