Various Artists

For its 60th anniversary year, Universal Music Enterprises has begun reminding fans that "Motown Did It First"; now, the label that launched The Sound Of Young America is revisiting a box set that was released in celebration of its 50th anniversary a decade ago.  Motown: The Complete No. 1s featured more than 200 international chart-toppers, plus a handful of bonus masters that went to No. 1 through cover versions or samples. And the packaging was a delight: the discs were housed in five digipaks, all carried in an intricate replica of 2648 West Grand Boulevard - the Detroit building that served as the label's first office and studio space (and today is open to the public as The Motown Museum).  That package has been replicated, while a 6-song bonus disc adds a handful of extra Motown magic right up through recent remixes of Diana Ross classics, which have topped Billboard''s dance charts in the past two years.