Kailyn's Confession About Lauren, Briana's Breakdown, & More! Watch The Craziest Moments From The 'Teen Mom 2' Reunion

Part one of the Teen Mom 2 reunion aired this past Monday night and it was packed with some major O-M-G moments!

The MTV reality stars hit the stage to discuss their storylines with Dr. Drew and of course...left viewers in complete shock. From the violent brawl, to Briana DeJesus' breakdown over her absent father, to Kailyn Lowry's bombshell about her Instagram message to Lauren Comeau...things got crazy!