CM points are special points in moduli spaces of abelian

varieties. A particular example of such a moduli space is the modular

curve Y(1) which is obtained as the quotient of the complex upper

half-plane by the action of the modular group. The points of this

curve parametrize isomorphism classes of elliptic curves over the

complex numbers. The CM points correspond to elliptic curves with

complex multiplication (CM). I will explain a generalization of these

CM points to orthogonal Shimura varieties and give a precise

description of the values of certain automorphic forms obtained via

Borcherds' singular theta correspondence at these points.