Gonna do this awesome 100 sets challenge on Polyvore. ;)

The Aria Montgomery Challenge
 
01 Aria Montgomery
02 Lucy Hale
03 Ezra Fitz
04 Ian Harding
05 Aria & Ezra
06 Aria & Noel
07 Aria & Alison
08 Aria’s Fashion Sense
09 Aria’s Family: Ella & Byron, Mike
10 A’s messages
 
The Spencer Hastings Challenge
 
11 Spencer Hastings
12 Troian Bellisario
13 Spencer & Wren
14 Spencer & Ian
15 Spencer & Alex
16 Spencer & Toby
17 Spencer & Alison
18 Spencer’s Fashion Sense
19 Spencer’s Sister: Melissa
20 A’s messages
 
The Hanna Marin Challenge
 
21 Hanna Marin
22 Ashley Benson
23 Hanna & Mona
24 Hanna & Alison
25 Hanna & Sean
26 Hanna & Lucas
27 Hanna & Caleb
28 Hanna’s Fashion Sense
29 Hanna’s Mother: Ashley
30 A’s messages
 
The Emily Fields Challenge
 
31 Emily Fields
32 Shay Mitchel
33 Emily & Ben
34 Emily & Alison
35 Emily & Maya
36 Emily & Paige
37 Emily & Samara
38 Emily’s Fashion Sense
39 Emily’s Mother: Pam
40 A’s messages
 
The Episodes’ Challenge
 
41 Pilot
42 The Jenna Thing
43 To Kill a Mocking Girl
44 Can You Hear Me Now?
45 Reality Bites
46 There’s No Place Like Homecoming
47 The Homecoming Hangover
48 Please Do Talk About Me When I'm Gone 
49 The Perfect Storm
50 Keep Your Friends Close
51 Moments Later
52 Salt Meets Wound
53 Know Your Frenemies
54 Careful What You Wish For
55 If At First You Don't Succeed, Lie, Lie Again 
56 Je Suis Une Amie (I Am a Friend) 
57 The New Normal 
58 A Person of Interest 
59 Someone to Watch Over Me 
60 Monsters in the End 
61 For Whom the Bell Tolls
 
The Fun Challenge
 
62 Favorite Main Character
63 Favorite Supporting Character
64 Favorite Couple
65 Creepiest Couple
66 Who’s A?
67 Whose Kissing Who?
68 We All Have Secrets
69 The Guys 
70 The Girls 
71 Other Liars
72 Quote: Alision: "That's immortality my darlings"
73 Ali's Funeral 
74 Ali’s Memorial 
75 Sara Shepard's guest role 
76 Behind the scenes 
77 Swim Meets 
78 Stolen Money 
79 Broken Hearts 
80 Quote: Caleb: “What do you like to do for fun on weekends? Break old ladies’ hips?” (From Episode 18: “The Badass Seed”)
81 Quote: Hanna: “And now your mom’s back there packing boxes.” Emily: “Maybe we can pack her up.” (From Episode 22, “For Whom the Bell Tolls”)
82 Favorite Moment
83 Favorite Episode
84 Favorite Quote – Not an A messages
85 Favorite A message
86 Most Shocking Secret
87 Most Shocking Moment
88 Behind the Scenes