Britney Spears
Hit: Baby One More Time... & Womanizer
Flop: Perfume & Radar
Christina Aguilera
Hit: Fighter & Beautiful
Flop: Basically anything from Bionic
P!nk
Hit: So What & Just Give Me A Reason
Flop: Walk of Shame & I Don't Believe You
Beyoncé
Hit: Single Ladies & Crazy In Love
Flop: Pretty Hurts & Run The World (There were plenty of singles that performed worse commercially, but this was supposed to be the big lead single, and it didn't even reach Top 25.)
Rihanna
Hit: Umbrella, & Diamonds
Flop: Jump & Loveeeeeee Song
Katy Perry
Hit: Firework & I Kissed A Girl
Flop: Thinking of You & Unconditionally
Lady Gaga
Hit: Poker Face & Bad Romance
Flop: G.U.Y. & Marry the Night (again, not that it was completely unsuccessful, just didn't have much impact at all)
Adele
Hit: Rolling In The Deep & Someone Like You
Flop: Chasing Pavements & Turning Tables
Taylor Swift
Hit: I Knew You Were Trouble & Shake It Off
Flop: The Last Time & Sweeter Than Fiction
Miley Cyrus
Hit: We Can't Stop & Wrecking Ball
Flop: Adore You & Fly on the Wall
Fergie
Hit: Fergalicious & Glamorous
Flop:
Gwen Stefani
Hit: Hollaback Girl & The Sweet Escape
Flop: Baby Don't Lie & 4 in the Morning
Shakira
Hit: Whenever, Wherever & Hips Don't Lie
Flop: Not sure. Most of her U.S. flops were big hits elsewhere
Kelly Clarkson
Hit: Since U Been Gone & Stronger
Flop: Low & Darkside
Avril Lavigne
Hit: Girlfriend & Complicated
Flop: Hello Kitty & Rock N Roll
Jennifer Lopez
Hit: On The Floor & If You Had My Love
Flop: Everything from AKA
Ke$ha
Hit: Tik Tok & Die Young
Flop: Crazy Kids & C'mon
Nicki Minaj
Hit: Super Bass & Starships
Flop: Pills N Potions & Beez In The Trap
Iggy Azalea
Hit: Fancy & Black Widow
Flop: Work & Bounce