Rock singer Melissa Etheridge and her partner, actress Tammy Lynn Michaels, announced on Saturday that Michaels had given birth to twins. The couple said on Etheridge's Web site that son Miller Steven and daughter Johnnie Rose were born last Tuesday.

"The creation of life brings about immeasurable love, and pours hope into the future," they wrote in a statement issued over the weekend. "The joy will help carry us through our upcoming sleepless nights."

Etheridge, 45, and Tammy, 31, who has acted on TV's Committed and The L Word, exchanged vows in Malibu in September 2003. Etheridge already has two children from a previous relationship with Julie Cypher: daughter Bailey Jean, 9, and son Beckett, 7.

Bailey Jean and Beckett were conceived via artificial insemination courtesy of friend and rock legend David Crosby, reports People magazine.

Etheridge announced in August 2005 that she was free of cancer nine months after undergoing surgery to remove a malignant tumor in her breast. Crediting Michaels as being instrumental in her successful health battle, Etheridge also told People magazine in 2005: "We thought about children before the diagnosis but were sidetracked."

When the couple announced this pregnancy in April, the singer and the actress said in a joint statement on Etheridge's official Web site, "To answer the obvious question: We used an anonymous donor from a bank."

The Kansas-born singer-songwriter, known for such hits as "Come to My Window" and "I'm the Only One," has sold more than 25 million records.

Until next time!