P.S. I Love You (Robin Daggers song)

"P.S. I Love You" is a song written by Craig Thomas and Carter Bays for the CBS television series How I Met Your Mother. The song was performed by Canadian actress Cobie Smulders in the role of Robin Scherbatsky, who has a secret past as a teenage Canadian pop star with the stage name Robin Sparkles. It appeared in an episode of the same name which aired on February 4, 2013.

The song, inspired by Alanis Morissette's "You Oughta Know" (1995), marks the last appearance of Robin Sparkles on the show. It was released as a single on the TV-premiere date, and appeared on the soundtrack album How I Met Your Music: Deluxe (2014). Smulders' persona was renamed "Robin Daggers", and lyrically "P.S. I Love You" depicts Daggers' obsession with a former lover. Its music video featured Daggers with a new look, inspired by Courtney Love. Television and music critics praised its humor and Smulders' performance.