According to The Sun, the Frenchman was proud as punch while watching Chezza perform new single 'Crazy Stupid Love' on the Britain's Got Talent finale.
Cheryl was linked to Jean-Bernard last month after they were seen spending time together at the Cannes Film Festival and, while she hasn't confirmed a romance, clearly they are close as he jetted out to the UK to see her.
Club owner Jean-Bernard is quoted as telling the newspaper: 'She is amazing. It was good to see her performing. I was proud. Impressed? Yes – very impressed."
Cheryl's performance on the Britain's Got Talent finale marked her first live performance in ages. It came the week she released new song 'Crazy Stupid Love' to radio.
Her album is expected later this year.
As well as working on her music, the former Girls Aloud star will be back on the judging panel at X Factor when it kicks off later this year.
She confirmed earlier this year she'll reunite with Simon Cowell on the UK show after leaving in 2011 to work on the American version. Poor Chez was sacked just a few days into her US job, amid claims her Geordie accent might be hard for the American audience to understand.
But now she's patched things up with Simon (after making him grovel and beg, as she should!) and will be back on our screens this year.
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Watch Cheryl's 'Crazy Stupid Love' video below: