Kendall and Kylie Jenner, respectively 19 and 16, were spotted at the book signing of their newly-released novel Rebels: City of Indra: The Story of Lex and Livia, at The Grove in Los Angeles. The two sisters may have a different appearances and taste in makeup, hairstyles and fashion, but we thought they both showed two fault-less looks. Who do you think looked better?

While Kendall opted for an elegant white jumpsuit, Kylie remained faithful to her edgy look and rocked a black skater skirt with a simple cream top, accessorized with a black fedora hat. Both of their styles are ideal for the summer and would work for any stylish occasion.

If you feel you would like a drastic change for the summer, why don't you try Kylie's blunt bob? Usually this hairstyle best suits oval, round or heart-shaped faces, so make sure you are certain of the change, because it is pretty drastic! On the plus side, this haircut is always very easy to style and if you feel like you want to add a twist to your hair color, why don't you try Kylie's ombré look? It definitely brings style and originality to her look!

For those who do not want to risk it, we recommend the most wanted summer hairstyle look: wavy, beachy curls. Kendall went for a natural hairstyle with these soft, loose waves. Not only does it look natural, it adds volume, and immediately revives any simple and thin-looking hair that needs to be a little spiced up. Read below to see what kind of products you can use to get this summer hairstyle!

Every hairstyle needs specific care and products. If you opt for Kylie's blunt bob, you can prevent dryness and damage with Ojon's Rare Blend Moisture Therapy. While the oil hydrates and softens, and boosts the natural shine of the hair, it also prevents frizzing. Blow-dry your hair after applying to get a similar, straight bob.

For Kendall's wavy curls, we recommend the Bumble and bumble Surf Spray. With just a couple of sprays, this product will style your hair by adding immediate volume and create the "after beach" look - sun-dried summer hair. This is particularly recommended for fine hair. If this isn't enough, use a curling iron to add a couple of waves to your hair.

Click through the gallery for more hair looks we love!

Don't forget to tell us what you think in the poll below -- would you rather wear Kendall or Kylie's hairstyle this summer?

Which hairstyle would you rather wear this summer?