Etheridge and girlfriend have twins

Melissa Etheridge

Rock singer Melissa Etheridge and her partner, Tammy Lynn Michaels, have twins, the couple announced.

Michaels gave birth to a boy Miller Steven and girl Johnnie Rose last week.

"Tammy and the babies are in excellent health," Etheridge said on her website. The babies were conceived using an anonymous donor from a sperm bank. "The creation of life brings about immeasurable love, and pours hope into the future. The joy will help carry us through our upcoming sleepless nights," the couple said in a statement.

Etheridge was diagnosed with breast cancer in 2004, but is now cancer-free.