Mackenzie Dern reacts to former training partner Bia Mesquita's UFC debut & offers advice

Mackenzie Dern reacts to Brazilian Jiu-Jitsu champion Bia Mesquita's UFC debut victory at UFC Rio. As former training partners and now fighting for a UFC title, Dern offers her advice. Twitter: http://www.twitter.com/MMACrazy Instagram: http://www.Instagram.com/MMA_Crazy Click on the link below to subscribe http://www.youtube.com/user/mmacrazytv?sub_confirmation=1