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Debut
Lee Soo-man, producer and former CEO of SM entertainment, announced his plan of a new boy group that will debut in March or April in 2012. -
Songs
In Aug, 2011, SM Entertainment held 2 events called "Music Camp" in Norway and Denmark. The event had over 50 composers looking for the right song that will match his new boy groups, which is temporarily called M1 and M2, concept. -
Teasers Member KAI
SM Entertainment decided to do a countdown teaser on Dec. 21, 2011. 100 Days before their debut. The first member KAI was introduced. -
Teaser 2 Members KAI and Luhan
Member Luhan was introduced along with KAI dancing to the song "Time Control" by EXO. -
Teaser 3 Member Tao
Member Tao was revealed to the public. In this teaer, he was showing his wushu (or martial arts). -
SBS "Gayo Daejun"
The first 4 members Kai, Luhan, Tao, and Chen was introduced to the public. They sang, danced and played indtruments with their SM Entertainment seniors -
Teaser 4-6 KAI
Teaser 4-6 were all member KAI dancing to different songs that will be on EXO's debut album. -
Teaser 7 MEmbers Sehun & Kai
This teaser revealed the youngest member of EXO-K and Kai dancing to one of EXO's songs Run&Gun. -
Teaser 8 Member Sehun
After releasing a teaser with Sehun the day before, Sm ENT. released another teaser with him. -
Teaser 9 Members Luhan&Kai
For 3 days straight SM ENT. released a teaser with Sehun. In this teaser, Luhan and Sehun were shown travelling and searching for something. -
Teaser 10 Member LAY
In this teaser, SM ENT. introduced antoher dancing member LAY. -
Teaser 11 Member Xiumin
Another member, Xiumin was revealed. -
Prologue Single
The group released their prologue single "What is Love" both in Chinese and Korean. THe song ranked 88 on Korea's Gaon Single Chart. This was composed by Teddy Riley and written by Yoo Young Jin. -
END of their teasers
After releasing 22 teasers, their last teaser was released. Members KAI, Luhan, Sehun, Tao, Kris, Chen, Xiumin, Chanyeol, Baekhyun, Lay, D.O., and Leader Suho were introduced. -
Showcase
100 days after their 1st teaser was released, they held a showcase in Korea to celecbrate their debut of teasers. The next day, they will have a chowcase in China. Their Showcase in Korea was uploaded on SM Ent.'s Youtube channel (SMTOWN) in English subs so that Internationals fans could understand what they are watching. -
Debut Single
On April 8, they released their debut single "MAMA". Even though the title is MAMA, MAMA mean majesty. It is written by Yoo Youngjin, who wrote songs for Super Junior, TVXQ, Shinee, F(X), Girls' Genertaion and many more Sm Ent. artist. MAMA ranked 1st on China's Sina Charts and 31 on Korea's Goan Single Chart. -
Second Prologue single
On March 9, EXO released "History" in Chinese and Korean. It ranked number 6 on China's Sina Charts and 68 on Korea's GAon Single Chart.
