This collection of Michael Jackson retreads from the Motown era seems towalk the line between shameless cash grab and worthy tribute. Generally,the best cuts here stay close to the spirit of the originals: Of the threetakes on the Jackson 5’s “Dancing Machine,” one is great (Polow Da Don’sdisco-hip-hop celebration), and two ain’t (overdone techno overhauls by DJsSteve Aoki and Paul Oakenfold). But there are exceptions. On producerSalaam Remi’s outrageous reggae version of “ABC,” Michael’s junior JamesBrown testimony will make even purists grin like fools. In the end, Jacksonproves to be more mutable than maybe even he knew.