On January 16, AOA released their fifth single and single album, "Miniskirt," which was produced by Brave Brothers, ElephantKingdom and Galactika.
Shortly after its release, FNC announced that Seolhyun would sit out promotions for the song after injuring herself.
The song went on to be a huge success and peaked at #11 on Gaon Digital Chart and #8 on Billboard K-Pop Hot 100, which garnered them a lot of nationwide attention throughout South Korea and spawned their first hit song.
On February 9, the group celebrated their first music show win on Inkigayo.

In March, it was announced that member Seolhyun would make her theatrical debut in the action film, "Gangnam Blues".
In May that year, AOA appeared on Real Man to perform their hit song and play a quiz showdown with the soldiers.

The following month, AOA released the single "Short Hair" alongside their first mini album on June 19.
The album peaked at #4 on Gaon Weekly Album Chart, and the song at #5 on the Digital Chart and also topped the M Countdown chart in July.
The music video ranked eighth on Billboard's "Most Viewed K-pop Videos Around the World" for June.
The following month, they released their first photobook, which was accompanied with a behind the scenes video to promote the release.

Due to their rising popularity, AOA released their first Japanese single, a Japanese-language version of their hit song "Miniskirt" on October 1.
Soon after, they were chosen as the promotional models for a mobile RPG, 'Fantasy Hero.'
In late October, FNC announced that AOA would be having another comeback, and shortly afterwards, began releasing teasers for the music video, unveiling a darker Catwoman concept.
The song and music video for Like a Cat were released on November 11, and the music video co-starred Daniel Snoeks.
The song was a huge success, peaking at #5 on the Gaon Digital Chart, and ranking #1 on Gaon Social Chart for six consecutive weeks.
On November 19, AOA took home their second music show win on Show Champion.

By the end of the year, AOA's rising popularity and nationwide success due to their consecutive hit songs earned them a spot in the top 5 of best-selling girl groups of the year on Gaon.

AOA released a Japanese version of Like a Cat on February 25, 2015.
The single also came with the Japanese versions of their original Korean songs "Elvis" and "Just the Two of Us".
On February 2, FNC released the short version music video of the Japanese version of "Like a Cat", and it ranked No.
1 on Gayp!
views daily and weekly ranking.
Like a Cat ranked #6 on Oricon Daily Chart and ranked #1 on Tower Records Shibuya on the first day of its release; it also ranked No.
3 as their peak on Oricon Daily Chart.

AOA's first reality show "Open Up!
AOA" premiered on February 26 on portal site Naver.
The series consisted of 10 episodes, each 10 minutes long, and aired every Thursday.
All eight members, including drummer Youkyung, were on the program.
AOA started filming their new variety show with MBC Music called AOA One Fine Day in Nanwan Monkey Island, Hainan, China on April 7, 2015. '
One Fine Day' started broadcasting on June 13, 2015.

On June 2, 2015, FNC confirmed the group were preparing for comeback aimed for mid-June.
The poster for the group's EP "Heart Attack" was released weeks later, and the song and mini album were released on the 22nd.
The group's comeback showcase was held the same day at AX-Hall Seoul.
The comeback ended up being a massive success.
It peaked at number 2 on Gaon Digital Chart and in the music chart's year-end digital chart, it placed in the top 20 with over one million downloads by the year's end.
The song is also reported to be one of the longest charting songs on Melon's music chart.

In August 2015, the group made their first appearances in the United States performing at KCON 2015 in Los Angeles on August 2 and New York on August 8.
In the same month, it was revealed that AOA would make a comeback in Japan with a full-length album, being the first full-length album for AOA to release, featuring 8 of their previous Japanese singles and 3 new so
On January 16, AOA released their fifth single and single album, "Miniskirt," which was produced by Brave Brothers, ElephantKingdom and Galactika. Shortly after its release, FNC announced that Seolhyun would sit out promotions for the song after injuring herself. The song went on to be a huge success and peaked at #11 on Gaon Digital Chart and #8 on Billboard K-Pop Hot 100, which garnered them a lot of nationwide attention throughout South Korea and spawned their first hit song. On February 9, the group celebrated their first music show win on Inkigayo.
In March, it was announced that member Seolhyun would make her theatrical debut in the action film, "Gangnam Blues". In May that year, AOA appeared on Real Man to perform their hit song and play a quiz showdown with the soldiers.
The following month, AOA released the single "Short Hair" alongside their first mini album on June 19. The album peaked at #4 on Gaon Weekly Album Chart, and the song at #5 on the Digital Chart and also topped the M Countdown chart in July. The music video ranked eighth on Billboard's "Most Viewed K-pop Videos Around the World" for June. The following month, they released their first photobook, which was accompanied with a behind the scenes video to promote the release.
Due to their rising popularity, AOA released their first Japanese single, a Japanese-language version of their hit song "Miniskirt" on October 1. Soon after, they were chosen as the promotional models for a mobile RPG, 'Fantasy Hero.' In late October, FNC announced that AOA would be having another comeback, and shortly afterwards, began releasing teasers for the music video, unveiling a darker Catwoman concept. The song and music video for Like a Cat were released on November 11, and the music video co-starred Daniel Snoeks. The song was a huge success, peaking at #5 on the Gaon Digital Chart, and ranking #1 on Gaon Social Chart for six consecutive weeks. On November 19, AOA took home their second music show win on Show Champion.
By the end of the year, AOA's rising popularity and nationwide success due to their consecutive hit songs earned them a spot in the top 5 of best-selling girl groups of the year on Gaon.
AOA released a Japanese version of Like a Cat on February 25, 2015. The single also came with the Japanese versions of their original Korean songs "Elvis" and "Just the Two of Us". On February 2, FNC released the short version music video of the Japanese version of "Like a Cat", and it ranked No. 1 on Gayp! views daily and weekly ranking. Like a Cat ranked #6 on Oricon Daily Chart and ranked #1 on Tower Records Shibuya on the first day of its release; it also ranked No. 3 as their peak on Oricon Daily Chart.
AOA's first reality show "Open Up! AOA" premiered on February 26 on portal site Naver. The series consisted of 10 episodes, each 10 minutes long, and aired every Thursday. All eight members, including drummer Youkyung, were on the program. AOA started filming their new variety show with MBC Music called AOA One Fine Day in Nanwan Monkey Island, Hainan, China on April 7, 2015. 'One Fine Day' started broadcasting on June 13, 2015.
On June 2, 2015, FNC confirmed the group were preparing for comeback aimed for mid-June. The poster for the group's EP "Heart Attack" was released weeks later, and the song and mini album were released on the 22nd. The group's comeback showcase was held the same day at AX-Hall Seoul. The comeback ended up being a massive success. It peaked at number 2 on Gaon Digital Chart and in the music chart's year-end digital chart, it placed in the top 20 with over one million downloads by the year's end. The song is also reported to be one of the longest charting songs on Melon's music chart.
In August 2015, the group made their first appearances in the United States performing at KCON 2015 in Los Angeles on August 2 and New York on August 8. In the same month, it was revealed that AOA would make a comeback in Japan with a full-length album, being the first full-length album for AOA to release, featuring 8 of their previous Japanese singles and 3 new so
AOA (group)