Psy didn't end his reign of viral success after "Gangnam Style." He came back strong with "Hangover" which featured the famous American rapper, Snoop Dogg!

G-Dragon and Missy Elliott brought fire to the stage with their amazing collaboration! "Niliria" was blazing hot and no one was ready for the amazing amounts of Korean-English fusion rapping.

Does anybody else remember their jaw-dropping once they heard this song on the radio?! It was a big step for K-Pop when the Wonder Girls teamed up with Akon.

"Gettin' Dumb" and "Take on The World" were absolute party masterpieces! Will.i.am is known for having a distinct sound, just like 2NE1, and combined they made real magic happen.

One of the most interesting stages in K-Pop history goes out to this live performance of "Heard em' all." Amerie really livened up the stage with intense choreography and outstanding vocals alongside 4minute.

Most definitely a unique pairing, but who could forget the awesome music that JYJ and Kanye created together? "Ayy Girl" is a real bop.

Based on their hit movie on 'Teen Nick,' the Wonder Girls paired up (or more like challenged) with the School Gyrls in their hit single "The DJ is Mine." #CatFight

Yet again, another interesting combination graced the K-Pop scene. Lil Kim and Se7en created a very different sound but heavily autotuned R&B track that was catchy enough for us to never forget it. The all English lyrics make it a very popular song for international fans.

Many K-Pop fans know of the many contributions created by the hands of Teddy Riley. Jay Park was no exception as he teamed up with the producer to create the amazing (but also hilarious) English song "Demon."

Fans of T-ara will forever hate Chris Brown for a lot of reasons. While visiting America and touring with the artist, T-ara N4 put on a performance that didn't end so gracefully.

BIG BANG truly are the kings of K-Pop as they have, both as a group and individually, collaborated with a plethora of international artists. This British artist known as Pixie Lott brought together T.O.P and G-Dragon and created a wonderful track. Listen to the song alongside this stellar fan-made MV.

Taeyang really showed off his swag and smooth vocals alongside Jeff Bernett with "Call You Mine."

"Incredible" truly lives up to its name. XIA's Junsu and Quincy came together to create this lively, auto-tuned dance track.

"AEAO" will give you goosebumps as it delivers a legitimate old-school, Hip Hop sound that you can't help but fall in love with. This collaboration was by far one of the best and outshines today's rap songs hands down.

Pair two heavenly vocals such as Eric Benet and Ailee and of course you get "Almost Paradise." Their vocals shine bright and are absolutely flawless together as they harmonize on stage effortlessly.

If you're looking for the real party anthem of K-Pop, "Dirty Vibe" is your best choice. The leading talent of YG paired up with America's greatest DJs in order to create a real dance track you don't wanna miss.

Although Bruno Mars didn't actually sing with Taemin, Bruno helped produce and create some of the lyrics for this killer sexy song! The super alluring style fits Taemin to a T.

You can see the joy in Rap Monster's face as he pairs up with old school rapper Warren G (Regulators!) to create some real rap sensations.

Because Anna Kendrick (winning or flopping - the choice is yours) trying the life of a K-Pop star is still a great laugh and experience altogether! These artists really created a humorous look on K-Pop's rigorous training and music development.