Machine Gun Kelly talks about the outfit he wore his first time on our show in 2012, meeting a young upcoming Disney star named Zendaya while he was here, getting engaged to Megan Fox, their trip to Costa Rica where they had a life-changing experience doing Ayahuasca together, his friendship with Pete Davidson, and asking Lil Wayne to be on his new album 'Mainstream Sellout.' Watch Jimmy Kimmel Live! WEEKNIGHTS 11:35/10:35c on ABC. Stream on Hulu.