David Balls of Digital Spy gave the song a positive review stating:
David Guetta must feel like le chat who got la crème. During 2009, the French knob-twiddler has notched up a pair of No.1s ('When Love Takes Over', 'Sexy Bitch'), produced The Black Eyed Peas' record-breaking smash 'I Gotta Feeling', and teamed up with a glittering array of A-list stars for his One Love album. What's more, he hasn't run of out puff just yet. This time around, he's recruited our very own Estelle to help him pack out the dancefloor. His production's as clubby and anthemic as ever, but it's La Swaray who brings that extra bit of magic to 'One Love'. As with her 2005 Faithless collaboration 'Why Go?', her vocals ooze a melancholy optimism that dovetails perfectly with the heady beats. The result not only extends Guetta's winning streak, but also whets the appetite for Estelle LP#3 – in prog now. 
The official video for the song was directed by X. It was filmed on 17 October 2009 in Los Angeles and released on 12 November 2009 on David Guetta's official YouTube channel. The video features Guetta and Estelle getting into a black 1967 Camaro with Guetta playing the upcoming song on his Nokia phone & features them driving though the city. As they go they find depressed people and make them happy, causing them to dance as they send their love through the shape of a heart created by their hands.