Britney Spears releases her ninth album, Glory, today, and to celebrate, the pop star stopped by James Corden’s infamous L.A. commute for a little karaoke.

In addition to running through some of Brit’s greatest hits, like “Toxic” and “Oops!...I Did It Again,” Corden got to gush with Spears about each of their kids. Britney’s sons are 9 and 10, and it turns out she wants more of them — three more, to be exact. She just doesn’t really want to settle down with a guy to do it. “I don’t believe in marriage anymore,” she confessed. (French-kissing, though, is still on the table.)

For the sing-along to Britney’s breakout hit “...Baby One More Time,” Corden and Spears got in costume — as in that iconic sexy schoolgirl outfit that Britney wore in the video. Spears also attempted to coach Corden on recreating that perfect “mmmyeah” vocal, but there are some things only Britney can do.