The "Piece of Me" singer, who was decked out in all-black and rocked dark shades for the sunny car ride through the streets of West Hollywood, kicked things off by singing along to "Oops!... I Did It Again."
After slowly easing into the karaoke part of "Carpool Karaoke," Corden and Spears really started to get into the iconic track, even lip-syncing the iconic, Titanic-inspired spoken-word bridge. After all these years, Britney hasn't forgotten any of those references.
After their faux-emotional duet, Corden and Spears broached the subject of children. Corden gushed about his 5-year-old son, Max and his 1-year-old daughter, Carey, while Spears couldn't help but beam while talking about her sons -- 10-year-old Sean and 9-year-old Jayden -- whom she shares with ex-husband Kevin Federline.
"They're not babies anymore," the 34-year-old diva lamented, before admitting that she'd like to have more kids in the future.
"I would like to have like, three more," Spears shared. "I have to find the right guy first."
As they drove, Corden asked Spears to describe the ideal guy she's looking to marry, but she made it abundantly clear that tying the knot isn't something she sees happening
"I think I might not ever go to men again," Spears said. "I'm just done with men."
"You're saying you don't want to be with anyone, ever, for the rest of your life?" Corden asked.
"I mean, I might French kiss someone, but I'm not going to marry anyone," she replied. "I don't believe in marriage anymore."
Spears' previous marriage to Federline ended in divorce in 2007 after three years. She also famous wed her childhood friend, Jason Alexander, in 2004, at a chapel in Las Vegas, but that union was annulled less than three days later.
After the heavier love life talk came to an end, the two got back to the business of recreating more of Brit’s famous music video moments -- and for "…Baby One More Time," Corden brought out some costumes.