By Jennifer Velez
Updated Oct 20, 2015 @ 12:15 pm
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Credit: arianagrande/instagram

Instagram is good for a lot more than #foodporn and pictures of your cat—it’s also the perfect way to keep up with the constantly-changing hairstyles of your favorite celebrities. Proving this just last week was none other than Ariana Grande. While revealing the cover art for her upcoming single “Focus,” the 22-year-old brunette shocked the beauty world when her signature high ponytail was given a dramatic blonde update. But she definitely wasn’t the only one to send fans into a frenzy. In the past year, several stars, including Jennifer Lopez and Blake Lively, have taken to the photo-sharing site to show off their latest cuts and colors. Scroll through to see their stunning transformations.

Kylie Jenner

Of the many times the 18-year-old has switched up her hairstyle on social media (ICYMI, she just debuted a gorgeous blunt bob over the weekend), the “ashy dirty blonde” shade she revealed in September might be our favorite.

Kendall Jenner

Perhaps inspired by her younger sister’s penchant for wigs and extensions, Kendall Jenner gave us a taste of what she’d looked like with golden blonde tresses.

Jennifer Hudson

The singer took her pixie shorter than ever back in August. She captioned the photo: "All black every thang! Who needs hair, when u serving face!”

Katy Perry

In what was possibly the only hair color combo we hadn’t seen on the star, Katy Perry unveiled honey ombré highlights.

Rumer Willis

Months before she went strawberry blonde, the Dancing with the Stars champ cut her bob into an edgy pixie.

Jennifer Lopez

Over the summer, Lopez took her bob haircut even shorter. "Short hair don't care…" she captioned the smoldering snapshot.

Blake Lively

Ever the trendsetter, the Gossip Girl actress ditched her beachy blonde locks to go “bronde” (aka a cross between blonde and brunette).

Taraji P. Henson

Joining the rainbow hair club, Taraji P. Henson took to Instagram to reveal a stunning purple ombré hue.

Kate Hudson

The mother of two went straight to the photo-sharing site to show off a fresh, shoulder-length lob.

Hilary Duff

After playing around with a dramatic aqua shade, the Lizzie McGuire star surprised us yet again by going pink and purple.

Sarah Hyland

Only a week after getting a lob, Sarah Hyland revisited the salon for an even shorter chin-length bob. "Aaaaand it's gone," the star wrote on Instagram.

January Jones

A far cry from her Betty Draper days, January Jones swapped her blonde locks for a pale pink tone in time for the spring season.