"Still Unforgettable," due Sept. 9, is the sequel to 1991's "Unforgettable ... With Love," which sold more than 14 million copies worldwide and earned Cole several Grammy Awards. The title track on the latter album is a posthumous duet with Cole's legendary father, Nat King Cole. On the new album, father and daughter reunite for the lead single, "Walkin' My Baby Back Home."

"If there was going to be another 'duet' with Dad, I felt it should be something more whimsical, fun and light," Cole said in her bio. "At the same time, I was looking for a song that would also be familiar to a certain type of audience. I think this is going to work just as well. It's adorable and loving between parent and child. It feels like he's right there with me. How do you top that?"

"Still Unforgettable" is Cole's 21st studio effort and marks her first time in the producer's chair. The set comprises 14 standards, including "Come Rain or Come Shine," "The Best is Yet to Come" and "Nice 'N' Easy," samples of which are streaming at Cole's website.

The new album follows 2006's "Leavin'," which features pop, R&B and rock covers alongside the original tune "5 Minutes Away." Cole's version of Aretha Franklin's "Day Dreaming" on "Leavin'" marked her first urban/pop single in nearly 16 years and earned her another Grammy nomination.

The singer's eight-Grammy streak started in 1975 with her debut album, "Inseparable."

Reports recently revealed that Cole is being treated for Hepatitis C, but the condition is not expected to interfere with her tour plans.