Motley Crue's Nikki Sixx welcomes baby daughter with a pink bass

LOS ANGELES, CA - FEBRUARY 13: Courtney Bingham (L) and musician Nikki Sixx attend the EMI GRAMMY After-Party at Milk Studios on February 13, 2011 in Los Angeles, California. (Photo by David Livingston/Getty Images)

Motley Crue's Nikki Sixx welcomes baby daughter with a pink bass LOS ANGELES, CA - FEBRUARY 13: Courtney Bingham (L) and musician Nikki Sixx attend the EMI GRAMMY After-Party at Milk Studios on February 13, 2011 in Los Angeles, California. (Photo by David Livingston/Getty Images) (David Livingston)

Motley Crue bassist Nikki Sixx and his wife Courtney have officially welcomed their first child, Ruby Sixx.

USA Today quotes Sixx's recent Instagram post, reporting "a spunky little girl with a full head of hair" arrived on July 27.

"We are already sleep training her with a metronome and I got her a pink bass," Sixx added, who USA Today points out is a father again at age 60 after having had a vasectomy.

Sixx’s wife Courtney announced in a separate post that Ruby entered the world after 18 hours of labor.

“My heart just melted and I was instantly head over heels in love as my life changed forever in an instant,” the 33-year-old mom wrote, adding, "I never knew this kind of love existed.

“I am so excited to be a mommy and know Nikki will be the most wonderful daddy ever just as he has been with my four step-children.”

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