"That's What Love Is For" is a 1991 Billboard Hot 100 top ten single by Christian music singer Amy Grant. It was released as the fourth single from the Heart In Motion album. The single was the only one from the album to be released both to secular and Christian radio; "That's What Love Is For" was the album's second Christian radio single and its third pop radio single. In the United States, "That's What Love Is For" became Amy Grant's second Adult Contemporary chart-topper and third Top Ten Hot 100 single, peaking at #7, while in the United Kingdom the single reached #60.
A music video was produced to promote the single, and mixes shots of Grant wearing a red cloak and singing to the camera, while other shots of her singing are in black and white. It also features a male/female couple, sitting together on a bench but not looking at each other. At the 3:12 mark of the video (just after Grant sings the bridge leading into the last chorus), the couple are seen in black and white, holding each other loosely while the music plays and Grant sings. The video fades out on a shot of Grant singing ad-libs in front of a sepia-toned background. Off in the distance is the man, and further off, presumably the woman. Behind them all are four large letters with spell the word "LOVE".