"Rock U" is the first EP from the South Korea

South Korea

The Republic of Korea , , is a sovereign state in East Asia, located on the southern portion of the Korean Peninsula. It is neighbored by the People's Republic of China to the west, Japan to the east, North Korea to the north, and the East China Sea and Republic of China to the south...

 girl group

Girl group

A girl group is a popular music act featuring several young female singers who generally harmonise together.Girl groups emerged in the late 1950s as groups of young singers teamed up with behind-the-scenes songwriters and music producers to create hit singles, often featuring glossy production...

 Kara

Kara (band)

Kara is a popular South Korean girl group signed with DSP Media . The band name Kara comes from the Greek Word "chara" Kara (Hangul: 카라, Japanese: カラ, often stylized as KARA) is a popular South Korean girl group signed with DSP Media (DSP). The band name Kara comes from the Greek Word "chara" Kara...

. It was released on July 25, 2008. The song with the same title was choosed for the title track.

This was also the first album to feature the two new members of the group; Kang Jiyoung

Kang Jiyoung

Kang Jiyoung is a South Korean idol singer, member of the Korean girl group Kara.-Biography:Kang Jiyoung was born on January 18, 1994, in Paju, Republic of Korea. She debuted at the age of 15 as a third grade middle school student. She is one of the 2 members that joined after member Kim Sung Hee...

 and Goo Hara. The album also showed a big transition from the group's original "strong female" image to a "cute but natural" appeal.

History

After a 10 month hiatus, Kara returned with 2 new members 17-year-old Goo Hara and 14-year-old Kang Jiyoung, replacing Kim Sunghee who left for educational purposes. They promoted the song in the music shows KBS's Music Bank

Music Bank (TV series)

Music Bank is a South Korean music television program broadcast by Korean Broadcasting System, KBS. It airs live every Friday at 6:10 PM KST. It is currently hosted by guest MCs...

, MBC

Munhwa Broadcasting Corporation

Munhwa Broadcasting Corporation Munhwa Broadcasting Corporation Munhwa Broadcasting Corporation (MBC (Hangul : 문화방송주식회사, Munhwa Bangsong Jushikoesa) is one of four major national South Korean television and radio networks. Munhwa is the Korean word for "culture". Its flagship terrestrial television...

's Show! Music Core, SBS's Inkigayo

The Music Trend

The Music Trend is a South Korean music program broadcast by SBS. It airs live every Sunday at 3:50 PM KST. The show features some of the latest and most popular artists who perform on stage. It is currently hosted by Goo Ha-ra, IU and Nicole.- History :...

and Mnet's M! Countdown. A new version of the song "Good Day" called "Good Day: Season 2

Good Day: Season 2

"Good Day, Season 2" is the first digital single by South Korean girl group Kara. It is a remix of "Good Day" from their first mini-album "Rock U"...

" was released on October 13, 2008 as a digital single. A remix

Remix

A remix is an alternative version of a recorded song, made from an original version. This term is also used for any alterations of media other than song ....

 version of the song "What's This" entered in the special edition

Honey (Kara song)

"Honey" is a EP by K-pop girl group Kara. It was released on online music sites on February 12, 2009, with a physical release on February 18, 2009...

 of the group's second EP "Pretty Girl

Pretty Girl (song)

Pretty Girl is a the second mini-album by K-pop girl group Kara. It was released on online music sites and on CD on December 4, 2008.-History:...

".

Tracklist

Chart performance

Chart (2011)	Peak position
Japan Oricon Oricon , established in 1999, is the holding company at the head of a Japanese corporate group that supplies statistics and information on music and the music industry in Japan. It started as , which was founded by Sōkō Koike in November 1967 and became known for its music charts. Oricon Inc... Weekly albums	106

Release history

Country	Date	Format	Label
South Korea South Korea The Republic of Korea , , is a sovereign state in East Asia, located on the southern portion of the Korean Peninsula. It is neighbored by the People's Republic of China to the west, Japan to the east, North Korea to the north, and the East China Sea and Republic of China to the south...	July 25, 2008	Digital download Music download A music download is the transferral of music from an Internet-facing computer or website to a user's local computer. This term encompasses both legal downloads and downloads of copyright material without permission or payment...	CJ E&M DSP Media
	July 31, 2008	CD Compact Disc The Compact Disc is an optical disc used to store digital data. It was originally developed to store and playback sound recordings exclusively, but later expanded to encompass data storage , write-once audio and data storage , rewritable media , Video Compact Discs , Super Video Compact Discs ,...
Japan Japan Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...	February 23, 2011	CD, Digital download	Universal Sigma