AceShowbiz - Christina Aguilera joined James Corden on "Carpool Karaoke" in the Monday, April 23 episode of "The Late Late Show with James Corden". Not only flaunting her amazing set of pipes, the "Reflection" hitmaker also spilled secrets in Britney Spears and Justin Timberlake's highly-published romance.

After belting out her hit song "Fighter" together with the singer, host James brought up "Mickey Mouse Club" to the discussion. Talking about the Disney show, which she starred alongside Justin, Britney and Ryan Gosling, Christina revealed big secrets about the romance on the set.

She admitted that there was a "thing" between her and Britney as they both had a huge crush on Justin. But of course, Britney was the one who caught Justin's attention as they dated back in 1999 before famously splitting up in 2002.

Christina went on saying that Justin "had swag back then," even before the "Mirror" hitmaker hit puberty. In addition, she believed that Ryan had a crush on Britney. When James said that Britney must be in regret to miss the "La La Land" actor, Christina quickly said that she must be fine because "she got Justin."

The two were later joined by actress Melissa McCarthy. The trio made things a little sexier as they sang "Dirrty" inside the car, with McCarthy nailing Redman's rap.

Before singing Christina's oldest hits, "Genie in a Bottle", she attempted to teach the host and the comedian how to properly be a diva. They also had a moment of a quick vocal warm-up, during which she showed how far she could hit high notes.