'Invincible' singer Kelly Clarkson has admitted she did in fact once date her ‘American Idol’ co-star Justin Guarini, during an appearance on Andy Cohen’s talk show, where she played the revealing ‘Plead The Fifth’ game.

Kelly ClarksonClarkson has admitted to counting Justin Guarini among her exes.

Guarini had claimed during his one man show Lovesick last year that he and Kelly had dated, causing Cohen to cheekily ask the singer, "What happened between the two of you: second base?”

But before the host could finish Clarkson told him, "We didn't date during 'Idol', which everybody thought we were dating. We did date during...I feel like we weren't dating during the movie. But I feel like maybe we did. We did date a little bit.”

"I think any two people who are thrown together that much [would eventually date]. 'Timeless,' you put that song on From Justin to Kelly—you can't fight it!” Clarkson continued.

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The pair both found fame during the 2002 season of ‘American Idol’, which Clarkson ultimately won, while Guarini finished in second place. The two then starred together in the 2003 movie From Justin To Kelly, which won the special ‘Worst "Musical" of Our First 25 Years’ award at that year's Golden Raspberries ceremony.

Clarkson also used the ‘Plead the Fifth’ game to address that tweet she sent about 2013 MTV Video Music awards, which many thought was a dig at Miley Cyrus. ‘Just saw a couple performances from the VMA's last night. 2 words.... #pitchystrippers’, Clarkson had wrote.

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But the singer told Cohen it was all a misunderstanding saying, “I never said Miley Cyrus. The fact that I tweeted "pitchy stripper" and people thought Miley Cyrus is not my problem…I'm not saying who it was!”

"I am not saying who it was because if I say it's not, then you're going to guess somebody else! You're trying to manipulate me! I'm going to drink more. Soon I'll say the truth, and then I can blame it on the alcohol!," Clarkson continued.

The episode also saw Clarkson admit she preferred Carrie Underwood doing The Sound of Music to Lady Gaga. While the singer also allowed Cohen to don a wig and help her act out scenes from the now infamous From Justin To Kelly  with the host saying, "Let's reboot the movie and see if we can't make you love it! It's time for Clubhouse Playhouse!"