Using an anonymous donor from a sperm bank, Tammy Lynn Michaels, long time partner of rock star Melissa Etheridge, gave birth to twins, the couple announced proudly on Friday. Michaels gave birth to a son, Miller Steven, and a daughter, Johnnie Rose, on Tuesday.

"Tammy and the babies are in excellent health," Etheridge stated in a web-blog.

Singer Melissa Etheridge and partner Tammy Lynn Michaels are increasing their family.

"We are thrilled to announce that Tammy is pregnant, and expecting our twins sometime around this fall," the singer reveals on her official Web site.