Chef is but one of 17 cameos this time out, and it's too bad Guru can't schlep all his guest stars on the tour bus (only The Roots are coming along, because it's their tour and they're footing the bill, though it's possible Erykah Badu could step to the stage if she's in town). The only thing missing is Barry White or Roberta Flack co-starring and a Donny Hathaway sample; this disc's so retro, it comes with its own time machine. Problem is, it's also the least insistent of Guru's solo works: You want more of Angie Stone ("Keep Your Worries" is the best song not on her own debut, which is a shame, since it needed at least one) or Macy Gray (more of her, always) and less of, oh, Isaac Hayes, whose voice makes a girl all wet...with tears of laughter, these days. And it rides a single bump-and-grind from start to finish; the ride never takes you anywhere, except to the CD player to change discs after the halftime "Interlude" that separates the wheat from the chaff. (The disc's first half beats the hell out of its second, especially by the time you get to the Herbie Hancock finale that's more "Rockit" than "Cantaloupe Island.") Not bad--Guru's kind of a genius, if you're grading on a curve--but not brilliant either, which is still enough to warrant a passing grade these days. Like this show needs a recommendation anyway: There ain't a better hip-hop act out there than The Roots. OK, not unless you count Outkast.