 Complete the following phrase:  Jackson reunited with songwritingproduction duo Jimmy Jam and Terry Lewis, their last collaboration being on her ninth studio album 20 Y.O. 2006. Additional songwriting and production was provided by Dem Jointz, Tommy McClendon and Thomas Lumpkins. Featured artists include rappers J. Cole and Missy Elliott. Unbreakables theme reflects various experiences over the course of Jacksons lifeincluding aspects of her childhood and the 