The mother-of-one invited just 50 guests including her fellow Voice mentors Adam Levine, Blake Shelton and his wife Miranda Lambert, for a games night at the Spare Room on Saturday according to Us Weekly.
Guests got tucked into mini-sliders and quesadillas before playing board games such as Connect Four, checkers, backgammon and bowls.
'Adam, Blake and Miranda all bowled,' said a source. 'Christina's really competitive and wanted games to be part of the party.'
Her boyfriend Matthew surprised her with a Marie Antoinette cake from Hansen's at midnight.
'Christina loves costumes and period pieces so it was perfect,' added the source. 'Everyone had a great time.'