"Baby Baby" is a 1991 single by Christian music and pop music singer Amy Grant. It was the theme song to the Heart In Motionconcept album, and was the first single derived from that album. The lyrics are the source of the album's title.

The song is featured on the soundtrack to the 2005 film Mr. & Mrs. Smith(albeit, a cover version). It it also featured in the 2004 film Harold and Kumar Go to White Castle.

"Baby Baby" was Amy Grant's biggest hit since her 1986 duet with Peter Cetera, "The Next Time I Fall." In the United States, "Baby Baby" was Grant's second number-one hit on the pop charts and her first as a solo artist, topping the Billboard Hot 100 and Adult Contemporary charts for two and three weeks, respectively. The single reached the Top Ten in seven countries, in addition to reaching #11 in Switzerland. In Britain, "Baby Baby" was the singer's first (and only) Top Five hit in that country, reaching #2. In the end, "Baby Baby" proved to be Grant's biggest hit and one of the most successful singles of 1991.