"Fallin' for You" is a song by American singer-songwriter Colbie Caillat. It was written by Caillat along with Rick Nowels, and produced by Nowels, John Shanks, and Caillat's father Ken Caillat, for her second studio album Breakthrough (2009). The song was released on June 26, 2009 as the lead single from the album, through Universal Republic. Musically, the song is a pop ballad, and the lyrics, according to Caillat, speak of people falling for a guy that they are friends with.

The song was included on the international soundtrack of the Brazilian soap opera Viver a Vida (Portuguese for Seize the Day). "Fallin' for You" is Caillat's fourth single to be included in a soap opera in Brazil. The first was "Bubbly" in Sete Pecados, the second was "Midnight Bottle" in Três Irmãs and the third was "Lucky" in Caras & Bocas.

The video was released in July and is directed by The Malloys.

In the video, she goes to the beach with a man, played by Bobby Moynihan, who is not her type (as she says during a phone call in the beginning of the video), but she starts to like him more and more over the course of the outing. At the end of the video when she sings the lyrics "Oh, I'm fallin' for you." the man pops out of the trailer asking, "Seriously? You mean it?" and Caillat nods, indicating that she has fallen for him.

YouTube singer/songwriter Kina Grannis did a cover of the song in August 2009.

German Maxi single

German CD single

The song debuted at #12 and was Caillat's highest debut ever on the Billboard Hot 100, the hot shot debut of the week and her most successful song on the U.S. charts since her debut single "Bubbly". The song returned to the Top 20 for two weeks, when her album debuted at #1, reaching #15. With 118,000 first-week downloads, it's also her first top 10 on the Hot Digital Songs chart since debut single "Bubbly" peaked at No. 4 in November 2007. On Billboard's Hot Adult Contemporary Tracks, the song spent 14 weeks at number two, before rising to number one the week of February 6, 2010. On the Canadian Hot 100, the song was the hot shot of the week, debuting at #55.

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