Megan Fox engaged again to Brian Austin Green . Diamond ring was lost on Hawaiian beach . Comment: Director Michael Bay announced this month that she is being replaced as Shia LaBeouf 's love interest by model-actress Rosie Huntington-Whiteley for `` Transformers 3 . '' Couple 's first engagement ended in February .
Megan Fox engaged again to Brian Austin Green . Diamond ring was lost on Hawaiian beach . Comment: Couple 's first engagement ended in February .