To mark their fifth wedding anniversary, Heidi Klum and Seal renewed their vows in front of their children and close family members Saturday at sunset in Costa Careyes, Mexico.

“The theme this year was brides and grooms,” a source tells UsMagazine.com. “All the guests wore black and white and dressed themselves up like brides and grooms. The minister was available to do vow renewals for anyone else who wanted them.”

Klum, 36, and Seal, 47, have made a tradition of renewing their vows every year. Last year, they had a “white trash”-themed ceremony, during which Klum wore her hair in cornrows and Seal sported a mullet (the officiant was even dressed as Elvis Presley).

“It’s our time – a lovely family time,” she recently told Redbook about their tradition. “It’s about remembering this moment of love we gave to each other and reinforcing it.”

She said renewing their vows also is something their kids, Leni, 6, Henry, 4, Johan, 3, and 7-month-old Lou, “have gotten accustomed to. It’s like, ‘Hey, Mom and Dad love each other and they get married every year!’”