. The song of the same name was used as the lead single for the album.
Singles
The song "Heart Attack" was written and composed by Brave Brothers.
The first music video teaser was released on June 14, 2015 with the second teaser released on June 16. AOA are dressed as lacrosse players in their teasers.[1][2][3]
AOA started their Korean promotions with a showcase on June 22 at AX Korea.
The promotion of "Heart Attack" began June 25 on the show
Inkigayo
.
They won their first music show for "Heart Attack" on July 1 on Show Champion.[4]
Japanese and Chinese versions
On June 17, 2015, it was revealed that AOA would release a Japanese and Chinese version of "Heart Attack". "Heart Attack" was released in Chinese on July 31, 2015 through
The Japanese version was released in Japan as a single on July 29, 2015 and AOA filmed a separate music video for it.[8] The single was released in eleven different versions: two limited CD+DVD editions, two limited CD+Photobook editions and seven limited CD only editions, one edition per member.
Track listing
Korean EP and Digital download
Shin Jimin
, Han Sungho, Seo Youngbae
Han Sungho, Seo Youngbae
Seo Youngbae
03:24
4.
"One Thing" (한개; Han Gae)
Brave Brothers, Chakun
Brave Brothers, Galactika
Galactika
03:21
5.
"Really Really" (진짜; Jinjja)
Brave Brothers, Chakun
Brave Brothers, Elephant Kingdom
Elephant Kingdom, Lee Jeongmin
03:56
6.
"Chocolate"
Galactika
Galactika, Miss Lee
Miss Lee
03:08
Total length:
20:34
Japanese limited edition "Type A, B" CD and Digital download