f(x) - 4 Walls

f(x) - 미행 (그림자: Shadow)

f(x) - Love (아이)

f(x) - Electric Shock

f(x) - Mr. Boogie

f(x) - NU ABO

f(x) - Rum Pum Pum Pum (첫 사랑니)

f(x) - Chu~♡

f(x) - Ice Cream

f(x) - Red Light

f(x) - Jet (제트별)

f(x) - No More (여우 같은 내 친구)

f(x) - Hot Summer

f(x) - Milk

f(x) - Pretty Girl

f(x) - Rude Love

f(x) - Signal (시그널)

f(x) - Butterfly (나비)

f(x) - Chocolate Love

f(x) - Dracula

f(x) - I Love You, I Love You

f(x) - Pinocchio (Danger)

f(x) - Sorry (Dear. Daddy)

f(x) - Airplane

f(x) - Deja Vu

f(x) - Ending Page

f(x) - Goodbye Summer (feat. Amber+Luna+Krystal))

f(x) - La ChA TA

f(x) - Lollipop (feat. SHINee)

f(x) - Papi

f(x) - Sweet Witches

f(x) - All Night

f(x) - Glitter

f(x) - Kick

f(x) - Stand Up!

f(x) - Step

f(x) - When I'm Alone

f(x) - 1, 2, 3

f(x) - All Mine

f(x) - Beautiful Goodbye

f(x) - Dangerous

f(x) - Diamond

f(x) - ME+U

f(x) - Paper Heart (종이 심장)

f(x) - Rainbow (무지개)

f(x) - So Into U

f(x) - Step By Me

f(x) - Surprise Party

f(x) - Toy

f(x) - Zig Zag (지그재그)

f(x) - …Is It OK?

f(x) - 4 Walls (Japanese Version)

f(x) - Beautiful Stranger (by f(Amber+Luna+Krystal))

f(x) - Boom Bang Boom

f(x) - Calling Out

f(x) - COWBOY

f(x) - Errand

f(x) - Gangsta Boy

f(x) - Hard But Easy

f(x) - Heartbeat

f(x) - Hot Summer (Japanese)

f(x) - It's Me

f(x) - Just a feeling

f(x) - Let's Try (훌쩍)

f(x) - Love Hate

f(x) - My Style

f(x) - Puzzle Bubble

f(x) - Snapshot

f(x) - Spit It Out (뱉어내)

f(x) - Spread Its Wings

f(x) - Summer Lover

f(x) - Thrill Love

f(x) - Tián Mi Mi

f(x) - Traveler (feat. Zico)

f(x) - Vacance (바캉스)

f(x) - Wave

f(x) - Wish List (12시 25분)

f(x) - X

f(x) - You are my destiny (Sung by f(Luna+Krystal))