Singer Melissa Etheridge plans to marry partner Tammy Lynn Michaels, she told "Extra."

"Yes, we have four children and we're trying to find the right time," she said.

Etheridge, 47, and Michaels, 33, first exchanged vows in Malibu in 2003. Now that gay marriage is legal in California, they plan to make it official.

In 2006, they welcomed twins, a boy named Miller Steven and a girl named Johnnie Rose.

Etheridge already has two children from a previous relationship with Julie Cypher: daughter Bailey Jean and son Beckett. (Bailey Jean and Beckett were conceived via artificial insemination courtesy of friend and rock legend David Crosby.)

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