When they released all of the Kollections last month, I decided to create a new, updated list to hopefully help people navigate them. I'll include information that I could find, such as the total cost of playing them, when they were released, etc. If you have any information to add or correct, please PM me rather than post here.
That being said, there is now a whooping total of 174 Kollections now available to play! This guide will list them all, going from far left (newest) to far right (oldest), as they appear in the long list that you have to scroll through to navigate the Kollection list. Also, in an attempt to avoid confusion regarding what you get, I made sure to have my doll wear basic Kloset items in the preview that shows up with the doll wearing the prizes (except the shoes, I forgot about those). If that makes sense. Anyways, let's begin with...
Silken Splendor
Released: Nov 10, 2022
Costs: 795 k-stars

Blonde Era (Couture Kollection)
Released: Nov 7, 2022
Costs 262 diamonds

In the Dollhouse
Released: Oct 20, 2022
Costs 795 k-stars

Dragon Slayer
Released: Oct 6, 2022
Costs 795 k-stars

Cozy in Cashmere
Released: Sep 15, 2022
Costs 795 k-stars

In the Heat of the Night
Released: Sep 1, 2022
Costs 795 k-stars

Under a Spell
Released: Aug 18, 2022
Costs 795 k-stars

Catch the Bouquet
Released: Aug 11, 2022
Costs 795 k-stars

Viva Las Wedding
Released: Jul 21, 2022
Costs 795 k-stars

Rose Gold Fantasy Released: Jul 7, 2022
Costs 795 k-stars

Please remember that this is a WIP so I'll add more posts as I have time.
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Editorial Edge
Released: Jun 23, 2022
Costs 795 K-stars
On the Cover
Released: Jun 14, 2022
Costs 262 Diamonds
Rain or Shine
Released: Jun 9, 2022
Costs 795 K-stars
Retro Realness
Released: May 26, 2022
Costs 795 K-stars
Silk and Shadow
Released: May 19, 2022
Costs 795 K-stars
Wild Glamour
Released: Apr 28, 2022
Costs 795 K-stars
Cyber Glam
Released: Apr 14, 2022
Costs 795 K-stars
Digital Doll
Released: Mar 31, 2022
Costs 795 K-stars
Midnight in Spring
Released: Mar 18, 2022
Costs 795 K-stars

Pajama PartyReleased: Feb 17, 2022
Costs 795 K-stars
Wild Hearts
Released: Jan 13, 2022
Costs 795 K-stars
Winter Wonderland
Released: Dec 23, 2021
Costs 795 K-stars
Snow Day
Released: Dec 9, 2021
Costs 795 K-stars
Sugar Rush
Released: Nov 18, 2021
Costs 795 K-stars
Back to Basics
Released: Nov 11, 2021
Costs 795 K-stars
Party All Night
Released: Oct 21, 2021
Costs 795 K-stars
Halloween Classics
Released: Oct 8, 2021
Costs 795 K-stars
Darling Diva
Released: Sep 24, 2021
Costs 795 K-stars
Stay Klassy
Released: Sep 10, 2021
Costs 795 K-stars
Bonfire Bombshell
Released: Aug 27, 2021
Costs 795 K-stars
Heiress Life
Released: Aug 13, 2021
Costs 795 K-stars
Romantic Getaway
Released: Jul 30, 2021
Costs 795 K-stars
(TBA, for some reason I'm missing that file and have to recreate it)
Sunny Days
Released: Jul 16, 2021
Costs 795 K-stars
Hollywood Dream
Released: Jul 2, 2021
Costs 795 K-stars
City Starlet (note: Kollection appears to have originally been named "Studio Zuhri")
Released: Jun 25, 2021
Costs 795 K-stars
Weather Girl
Released: Jun 4, 2021
Costs 795 K-stars
Dreaming of Daisies
Released: May 21, 2021
Costs 795 K-stars
90's Babe
Released: May 7, 2021
Costs 795 K-stars
New Royal
Released: Apr 23, 2021
Costs 795 K-stars
Floral Dream
Released: Apr 19, 2021
Costs 262 diamonds
Country Rose
Released: Apr 9, 2021
Costs 795 K-stars
Silver Starlet
Released: Mar 26, 2021
Costs 795 K-stars
Lunar Goddess
Released: Mar 2021
Costs 262 diamonds
Avant-Garde
Released: Mar 13, 2020
Costs 795 K-stars
Hollywood Glamour
Released: Feb 26, 2021
Costs 795 K-stars
Star of the Show
Released: Feb 2021
Costs 262 diamonds
A Perfect Date
Released: Feb 5, 2021
Costs 795 K-stars
A Goddess of Love
Released: Feb 2021
Costs 262 diamonds
Mermaid Queen
Released: Jan 22, 2021
Costs 795 K-stars
Starry Eyed
Released: Jan 8, 2021
Costs 795 K-stars
Parisian Chic
Released: Jan 2020
Costs 262 diamonds
Pop Princess
Released: Jan 2021
Costs 262 diamonds
Lovely Leather
Released: Dec 18, 2020
Costs 795 K-stars
Stunning in Silver
Released: Dec 4, 2020
Costs 795 K-stars
Snow Bunny
Released: Dec 2020
Costs 262 diamonds
Red Velvet
Released: Dec 2020
Costs 262 diamonds
Party Girl
Released: Nov 2020
Costs 262 diamonds
Kosmic Queen
Released: Nov 20, 2020
Costs 795 K-stars
Baby Blue
Released: Nov 13, 2020
Costs 795 K-stars
Dream Girl
Released: Nov 2020
Costs 262 diamonds
Devilishly Stylish
Released: Oct 23, 2020
Costs 795 K-stars
Rhinestone Cowgirl
Released: Oct 16, 2020
Costs 795 K-stars
Center Stage
Released: Fall 2020
Costs 262 diamonds
Iridescent Beauty
Released: Sep 25, 2020
Costs 795 K-stars
Purple Posh
Released: Sep 18, 2020
Costs 795 K-stars
One in a Million
Released: Fall 2020
Costs 262 diamonds
Beautifully Bold
Released: Aug 28-Sep 3, 2020
Costs 795 K-stars
Heavenly Blossom
Released: Aug 21-27, 2020
Costs 795 K-stars
Beautiful Eden
Released: Jul 31- Aug 6, 2020
Costs 795 K-stars
Sheer Floral
Released: Jul 24-30, 2020Costs 795 K-stars
Shimmer and Sheen
Released: Jul 3-7, 2020
Costs 795 K-stars
Soft and Sleek
Released: Jun 26- Jul 2, 2020
Costs 795 K-stars
Untamed Beauty
Released: Couldn’t find a date/time
Costs 262 diamonds
Lavish Allure
Released: Jun 5-11, 2020
Costs 795 K-stars
Enchanting Vision
Released: May 29- Jun 4, 2020
Costs 795 K-stars
Sheer Excellence
Released: May 10-16, 2020
Costs 795 K-stars
Modern Monarch
Released: May 1-9, 2020
Costs 795 K-stars
Dawn Till Dusk
Released: Apr 10-16, 2020
Costs 795 K-stars
Coral Queen
Released: Apr 3-9, 2020
Costs 795 K-stars
Bright and Brilliant
Released: Mar 13-19, 2020
Costs 795 K-stars
Making Headlines
Released: Mar 6-12, 2020
Costs 795 K-stars
Atelier Korkov
Released: Feb 24- Mar 19, 2020
Costs: 262 diamonds
Cloud Nine
Released: Feb 13-20, 2020
Costs 795 K-stars
Sleek and Chic
Released: Feb 6-13, 2020
Costs 785 K-stars
Dazzling Glimmer
Released: Jan 16-23, 2020
Costs 795 K-stars
In Full Bloom
Released: Jan 9-16, 2020
Costs 795 K-stars
Regal Icon
Released: Dec 19-26, 2019
Costs 795 K-stars
Wild and Free
Released: Dec 13-19, 2019
Costs 795 K-stars
Work of Art
Released: Nov 22-28, 2019
Costs 795 K-stars
Sequin Stunner
Released: Nov 15-21, 2019Costs 795 K-stars