Pete Guzman and his mom, Rosario, were eating dinner at Sapporo Japanese restaurant in Monterey, CA on Thursday when in walks his favorite MMA fighter, Daniel Cormier. Cormier was with his own family -- and as fate would have it, they were seated with Pete and Rosario at the hibachi table. And since it was Rosario's birthday, the Cormiers busted out their singing voices for a rendition of "Happy Birthday!"