The newlyweds - who only had four guests at their surprise secret wedding in Mustique earlier this month - threw a lavish bash at The Library members club in the capital.
Cheryl and JB both dressed in black outfits for the occasion, with Chezza dazzling in a stunning Ralph & Russo haute couture gown, complete with a see-through skirt.
Surprisingly, Cheryl also chose to wear her hair up, which revealed the 'Mrs.C' tattoo on her neck - a reference to her ex-husband Ashley Cole.
Joining the happy couple at the party were her former Girls Aloud bandmates Kimberley Walsh and Nicola Roberts, although there was no sign of Nadine Coyle or Sarah Harding.
Cheryl's mum, Joan, and Marvin and Rochelle Humes were also among the 50 guests.
And no expense was spared as guests sipped champagne and tucked into an Arabian-themed menu courtesy of La Roche restaurant.
After marrying Jean-Bernard after just three months together, Cheryl admitted she isn't in quite the same rush to start a family.
“If it happens, don’t get us wrong it happens. But it’s not in me plans,” she told The Times.
"I went through a real phase in my life recently, of like: maybe it’s not for me."