We sat down with Justin Bieber, perhaps the world's most loved pop star, to ask him for his definition of love. When he can finally get his answer out, he kept it short and sweet: "Just being completely head over heels for somebody and not caring about anything [else], just being completely all the way in."

Watch the video above to hear Justin say it himself. And watch this video to see Bieber singing along to "Call Me Maybe." Also, be sure to check out our all-day Bieber takeover on Fuse TV on July 21!