10. Lastly, Jennifer looked amazing in this red prom-style dress. This image appears in the gallery:Every Outfit Jennifer Lopez Wore To The 2015 American Music Awards 10. 10. Lastly, Jennifer looked amazing in this red prom-style dress. And that's not even the afterparty. Picture: Getty 10 images See the full gallery: Every Outfit Jennifer Lopez Wore To The 2015 American Music Awards