the Malibu Kiwanis' 25th Anniversary Chili Cook-Off and Carnival sunglasses tee shirt shorts Alessandra Ambrosio scarf model stuffed animals baby
Supermodel Alessandra Ambrosio and fiance Jamie Mazur got down to some monkey business at the Kiwanis' 30th Anniversary Chili Cook-Off and Carnival in Malibu on Sunday!

The event became a celeb hotspot -- LeAnn Rimes and Eddie Cibrian, Kevin Dillon, Camille Grammer, Tori Spelling and Gary Busey also brought their kiddos and crew to the summer picnic.

Alessandra and fiance Jamie were almost too good looking for words as they played with daughter Anja. They traded -- both wore a cute, unisex hat and both carried Anja.

The couple has been engaged for several years now -- Anja was born in 2008! We can't help but wonder ... when will they tie the knot??