The 33-year-old star and Johnson, 34 were joined by approximately 70 family members and friends at San Ysidro Ranch in Montecito, California on July 3 for their first pre-wedding celebration ahead of their marriage, reported E! Online.
The singer, who wore a beaded silver mini dress, got teary-eyed several times when friends stood up and gave heart-warming speeches to toast the couple," a source said, adding it was very sweet.
The couple's children were the centre of attention at the bash, and both were dressed in formal attire, according to the source.