The 25-year-old former Bachelor winner posed on the beach with husband Nik Richie in Cabo San Lucas, Mexico, ahead of the ceremony.
Shayne is the daughter of 53-year-old U.S. TV star Lorenzo Lamas, who wed his fifth wife Shawna Craig yesterday.
And at just 23 years old, Shawna is two years younger than Lorenzo’s daughter.
Shayne managed to grab everyone’s attention at the event when she raised a toast, telling her father: ‘You better marry this girl or you are going to die old and alone,’ RadarOnline reported.
Lamas was joined by some of his friends from his show The Bold & The Beautiful, including Ron Moss and Winsor Harmon.

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Pregnant Shayne Lamas dresses her bump in red as she attends her actor father Lorenzo’s fifth wedding
