By Rob Brunner
Updated March 23, 2007 04:00 AM

Single ”Shoo Be Doo” is a winning bit of retro R&B — Macy Gray wraps her sultry wheeze around a comfortable groove that lets her explore her voice’s fascinating cracks and warbles. And a few other tracks — the similarly soulful ”What I Gotta Do,” the Justin Timberlake and collaboration ”Okay” — are reminders of why Gray once seemed like a big deal. Elsewhere, though, highlights are scarce. Much of BIG is either boring or forced, as when Gray launches into ”You Spin Me Round (Like a Record)” for no discernible reason. B-