Jennifer Lopez's Ex-Husband Cris Judd Performs on 'American Idol' Finale

American Idol judge Jennifer Lopez attended Thursday's finale with her boyfriend, Casper Smart, on her arm, but another man from her past was on-stage: ex-husband Cris Judd!

The 46-year-old dancer took the stage during Idol alum Larry Platt's performance of his iconic "Pants on the Ground," and Instagrammed from backstage ahead of the big night.

"Getting ready for the Final Farewell Show! American Idol Season 15!" Judd captioned his selfie. "Thanks Uncle BB! @chantalrobson @rosuave28and Squid. #Creative #choreography."

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Fans on Twitter soon started to put two and two together:

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