Brian Austin Green reflects on deaths of '90210' costars Shannen Doherty and Luke Perry: 'It's sh---y'

Brian Austin Green reflects on deaths of '90210' costars Shannen Doherty and Luke Perry: 'It's sh---y'

"Appreciate all of these moments because you don't know how many more you're gonna get," the actor said.Frazer Harrison/Getty; Neilson Barnard/Getty; Monica Schipper/WireImage Brian Austin Green; Shannen Doherty; Luke PerryIf loss has taught Brian Austin Green nothing else, it's to never take the time left for granted.The actor reflected on the loss of his former Beverly Hills, 90210 costars Luke Perry and Shannen Doherty during a visit to the I…