VIDEO : Gwen Stefani Joins James Corden for Carpool Karaoke

What a ride! Gwen Stefani joined James Corden in the passenger seat for a round of Carpool Karaoke on last night's Late Late Show , and it was a truly magical experience. They got down to some of Gwen's new hits, some old hits, some No Doubt favorites, and of course, discussed her adorable relationship with Voice costar Blake Shelton . Singalongs included Gwen's's "Used to Love You," "Sweet Escape" and "Rich Girl," plus No Doubt's "Don't Speak." At one point, James complimented the 46-year-old singer's appearance.