Ohhh there are so many! Whether these songs were all over radio, had huge music videos or were just talked about/promoted constantly, I feel like these hits were supposed to be #1 (some of them at least top 3) on the Hot 100.
Katy Perry
Hot N' Cold (#3)
Wide Awake (#2)
Britney Spears
(You Drive Me) Crazy (#10)
Oops!...I Did It Again (#9)
Toxic (#9)
Till The World Ends (#3)
I Wanna Go (#7)
Lady Gaga
Paparazzi (#6)
Bad Romance (#2)
Telephone (#3)
P!nk
Get The Party Started (#4)
F**kin' Perfect (#2)
Blow Me (One Last Kiss) (#5)
Rihanna
Pon De Replay (#2)
Don't Stop The Music (#3)
Stay (#3)
Taylor Swift
You Belong With Me (#2)
Love Story (#4)
I Knew You Were Trouble. (#2)
Style (#6)
Kelly Clarkson
Since U Been Gone (#2)
Behind These Hazel Eyes (#6)
Because of You (#7)
Various Artists/Songs (From 2013-2014)
The Lumineers - Ho Hey (#3)
Imagine Dragons - Radioactive (#3)
Justin Timberlake - Mirrors (#2) & Not A Bad Thing (#8)
Miley Cyrus - We Can't Stop (#2)
Avicii - Wake Me Up! (#4)
OneRepublic - Counting Stars (#2)
Jason Derulo - Talk Dirty (#3)
Ariana Grande - Problem (#2) & Love Me Harder (#7)
Sam Smith - Stay With Me (#2)
Disclosure - Latch (#7)
Iggy Azalea ft. Rita Ora - Black Widow (#3)
Tove Lo - Habits (#3)
Maroon 5 - Animals (#3)
I assumed as a teenager that Slave 4 U & Dirrty were #1s because of how talked about they were at the time. Their chart peaks confused the hell outta me when I joined stan world.