Music video by Justin Bieber performing Baby feat. Ludacris. VEVOCertified on April 25, 2010. Lyrics [Usher:] Peace up! A Town Down! [Lil' Jon:] Yeah, (Yeah!) OK! (Usher! Usher! Usher! Usher!) [Lil' Jon:] Lil' Jon! [Usher:] Yeah, Yeah, Yeah! Yeah.