Korean - 

(not in any order)

Can You Smile (Infinite)
Only Tears (Infinite)
Be Mine (Infinite)
You and I (IU)
Dangerous (X-5)

I know I already have my top 5 but I'm just going to sneak The Chaser in there B|
Anyway, I'm upset that X-5 is like barely talked about and recognized by kpop fans.
X-5 is flippin' amazing T^T They need more attention because:

• They dress like princes
• Their music is addicting
• Their dancing is smooth and cool and bvdjkhbvkdjh
• They're really cute personality and appearance wise
• They captured my heart really quickly because they are that amazing

American -

One Wish (Ray J)
Bed (J.Holiday)
Best I Ever Had (Drake)
So Sick (Ne-Yo)
Take You Down (Chris Down)