Unbreakable ends the longest gap between albums from Janet Jackson, who went through a lot -- both professionally and personally -- after the release of 2008's Discipline, including the death of her brother Michael, prominent acting roles, and the establishment of her Rhythm Nation label. Created with longtime collaborators Jimmy Jam and Terry Lewis, the album features the hit slow jam "No Sleeep," as well as the blissful midtempo title track -- two familiar yet fresh-sounding singles. ~ Andy Kellman