Milestones

ADOPTED. By Carole Bayer Sager, 38, singer-lyricist, and her husband Burt Bacharach, 57, master songwriter and her collaborator for the past six years (the 1981 Oscar-winning song Arthur's Theme, the current hit That's What Friends Are For): their first child, a boy, born Dec. 3 (Bacharach has a daughter, 19, from his second marriage, to Actress Angie Dickinson); in Los Angeles. Name: Christopher Elton.