Cher is officially back in action.The irrepressible one-of-a-kind songstress, who started serving up hit singles in the 1960s alongside Sonny Bono, then on her own, has ended her more than a decade-long break from solo recording.At 66-years-old, Cher knocked out nine new tracks in the studio, tweeting in all caps Monday," I JUST FINISHED MY CD," marking the completion of her 26th album in her career.RELATED: The Supreme Court Takes on Cher's Use of the F WordThe CD's first single, "Woman's World," is slated for release in June."Another thing we've heard about this album is that she's working again with Christina Aguilera and Pink and then Lady Gaga, so you know, she's kind of reaching out to young people who are really hot in the business that can keep her image up and who clearly have looked up to her," Assistant News Director of EW.com, Laura Hertzfeld, told ABC News.In 2011, Cher cheered for her son, Chaz Bono, during his appearances on "Dancing with the Stars." He has recently lost 60 pounds by continuing to dance, practicing martial arts and watching what he eats.RELATED: Chaz Bono: I've Lost 60 Lbs.Next month, Cher will bring real-life drama to Lifetime with a documentary about her mother, "Dear Mom, Love Cher."Cher has had a number one hit in four of the last decades. A number one hit off this as yet untitled album would make it five in five decades.On May 1, Nightline's Cynthia McFadden will interview Cher about her legendary career.