Janet is 40 years old, but she has said that she feels half her age, and her breakthrough as a pop phenomenon occurred in 1986 -- hence the title of her ninth album. 20 Y.O. is her safest and tamest work since 1984's Dream Street, not only because she couldn't have possibly taken her sexed-up confessional routine beyond the tidbits and techniques divulged throughout 2004's Damita Jo. With only a few exceptions, 20 Y.O. provides further refinements of the fun, flirtatious, midtempo songs of her past several albums. This is not a problem.