The Fight For This Love hitmaker tied the knot with her boyfriend of three months on the Caribbean island of Mustique, with only her mother Joan Callaghan and assistant Lily England among the handful of guests at the secret ceremony.
On Monday night, Cole had a much larger guest list as 80 of the couple's friends and family attended a party celebrating the nuptials at private members' club The Library in London.
Among the invitees were Cole's former Girls Aloud bandmates Nicola Roberts and mother-to-be Kimberley Walsh, as well as The Saturdays singer Rochelle Humes and husband, former JLS star Marvin Humes.
Cole's The X Factor boss Simon Cowell was also expected at the party, and most of the guests arrived in monochrome attire.
Cole was photographed arriving hand-in-hand with her new husband wearing a black strapless floor-length gown while Fernandez-Versini matched in an all black suit.
The star announced her new marital status online on 13 July, writing: "I usually do not discuss my personal life but to stop the speculation I want to share my happy news... Jean-Bernard and I married on 7/7/14.
''We are very happy and excited to move forward with our lives together.''
The Crazy Stupid Love singer was previously married to footballer Ashley Cole.