"That's not something that I normally do, but it just ... really got under my skin," Green tells PEOPLE of his recent Instagram Stories post about Kelly trying to 'drag other people'

The "Beverly Hills, 90210" actor said his recent out-of-character diss of his ex's ex are the last you'll hear from him on the topic.

Brian Austin Green called out the rapper on his Instagram Stories, telling him to stop trying to "drag other people," alongside an article about Kelly's relationship with Megan Fox, now he is revealing why he got involved.