The 2014 American Music Awards kick off Sunday night at 8 p.m. ET on ABC, and the show's executive producer said that if you don't tune in as soon as the show starts, you'll be missing something "huge" and "outrageous." "Trust me. Don't come into the show at 8:10 p.m. Don't do that. You better start at 8 p.m., 'cause I ain't holdin' nothin' back. ... It's gonna open up with a huge 'wow,'" AMA executive producer Larry Klein told ABC News. "And it's gonna go for three hours and end with a big 'wow.'" With 18 musical performances from the likes of Taylor Swift, Lorde, 5 Seconds of Summer and many more, it's no wonder that the show will be a huge production. Klein said the challenge every year is trying to make sense out of many diverse performances. "The show represents all the different genres of music, so you got rap and hip-hop and country and R&B and pop and rock," he said. "And what you have to do is try to make all those things blend together into one, three-hour, cohesive show. That's a challenge."