While Kendall's rumoured romance with Harry Styles was the talk of the red carpet, it was her younger sister who stole the show with her style transformation.
Kylie debuted a new fringe as she arrived for the star-studded ceremony. The 16-year-old revealed heavy bangs that complemented her ombre tresses – but it seems she isn't quite ready commit to the look; the fringe was later revealed to be a clip-on.
Kylie looked chic and stylish in a monochrome ensemble, which included black velvet trousers and a white midriff-baring top, teamed with ankle boots and a Chanel clutch.
Her older sister Kendall, 18, chose a more revealing ensemble. She showcased her slender frame in a strapless white mini with cutouts, and a statement necklace as she hit the red carpet at the AMA’s, expertly fielding questions about her reported romance with One Direction's Harry.
Inside the Nokia Theatre, Kylie was seen sitting next to her rumoured beau, Jaden Smith. The young stars were pictured side-by-side, days after they were seen looking very much like a couple during a shopping spree around West Hollywood.
Last week, Jaden, 15, appeared to be in full boyfriend mode as he clasped a necklace around Kylie's neck, resting his chin gently on top of her head in a show of affection as the pair looked around a crystal shop together.
Back in April, Jaden appeared to confirm the couple's romance when he spoke about Kylie for the first time.
"She's one of my best friends," he said in an interview. "It's pretty awesome.
"I was in LA, we were all hanging out. Then I went to New York and she came too, then she came here and surprised me, so that’s pretty baller."
Kylie kept the rumour mill running in August when she publicly wished the young rapper a happy birthday.
Posting a sweet photo of the pair, she described Jaden as her "best friend", saying, "(I)can't remember when we met (but) I couldn't be more grateful that we did."
She added, "You understand me like not many do and you always know the right time to make me laugh."