The axis of Eva is solid old-school R&B you can instantly connect with. And the best cuts aren't even by Mary J., Usher, or LL Cool J, the movie's star. Check out Yoli, who sounds like a buoyant Tracy Chapman, or Calvin Richardson, who really is slicker than the average. And savor En Vogue's ''Lovin' You (Easy),'' so breezily beguiling, you'll wonder how the film could do it justice.

