//easy way:

Expression<Func<Artist, bool>> expression1 = a => ids.Contains(a.ID)

//the dynamic way:

var propertyType = typeof(int);

var parameter = Expression.Parameter(typeof (Artist), "a");

var body = Expression.Call(
	typeof(Enumerable).GetMethods().First(m => m.Name.Equals("Contains")).MakeGenericMethod(propertyType),
	Expression.NewArrayInit(propertyType, ids.Select(i => Expression.Constant(i)).ToArray()),
	Expression.Property(parameter, "ID"), propertyType));

var expression1 = Expression.Lambda<Func<Artist, bool>>(body, parameter);