J-Lo to Guest on "How I Met Your Mother"

Jennifer Lopez will play a self-help expert on an episode of the CBS comedy "How I Met Your Mother" in March.

The actress-singer portrays Anita Appleby, a no-nonsense author who tries to "train" men into better behavior in relationships. Her target is Neil Patrick Harris' playboy-bachelor character, Barney: Appleby makes it her mission to break him.

Photos: J-Lo: Her Life and Loves

The exact date of Lopez's episode hasn't been set. The Monday-night comedy recently reached a milestone with its 100th episode.