Korean netizens on an online community forum selected which girl group released in the second generation are their favorites. Here are the top six answers:

1. Girls' Generation - "Gee"

"Gee" is considered the Girls' Generation's breakthrough song. The song is a sweet, bubblegum pop song that talks about a girls' affection that they feel when they are in love. In South Korea, it was a massive success, snagging a record-breaking nine consecutive wins on Music Bank and three weeks on Inkigayo. It is considered the most popular song of the 2000s by MelOn.

2. Apink - "Mr. Chu"

During a time where groups were continually pushing out sexy concepts, Apink's "Mr. Chu" was considered a breath of fresh air for their purity and brightness. The song solidified them as K-pop's ultimate sweethearts. During the song's promotional period, Apink won six music show wins, and the rack was the eighth best-selling digital song of 2014. It was so popular; it was even used for a G9 TV commercial!

3. Miss A - "I Don't Need a Man"

"I Don't Need a Man" was released in 2012 as the lead single of "Independent Women Part III." The song was praised for its girl-power anthem, which was uncommon at the time. The song talks about them being strong and powerful, and how they don't need a man to save them. Despite the popularity, member Suzy revealed she didn't like the song, as, at the time, they already had a predominantly female fanbase, and she thought their male fans wouldn't like the music. Surprise, Suzy - the people love it!

4. f(x) - "Electric Shock"

"Electric Shock" is a song that compares love to an electric shock - it leaves you confused but excited at the same time! During the song's release, it debuted at the top of the Gaon Chart's single and digital download chart and sold 630,510 copies in its first week. Within the first three weeks of its release, it sold over a million copies. It is considered one of f(x)'s signature tracks and is a representative song for the group's sound.

5. T-ARA - "Roly-Poly"

"Roly-Poly" was released in 2011 as part of their second mini-album "John Travolta Wannabe." The song became the top-grossing and most downloaded song of 2011, garnered over 4.8 million downloads, which is the highest download figure of any K-pop singles in the 2010s. In 2012, it was even used for a stage musical featuring some T-ARA members, Davichi's Kang Minkyung, singer Jung Hyejin, and musical actress Park Haemi.

6. Wonder Girls - "Tell Me"

"Tell Me" was released in 2007 as part of their debut album "The Wonder Years." Despite how the members initially disliked the song, it was an instant hit, topping numerous music charts. It even received a triple crown on SBS Inkigayo. "Tell Me" earned the group the nickname "Korea's Little Sisters." The choreography for the song became a staple of Korean pop culture, with numerous fans and fellow idols covering the dance. Some notable groups which covered the song include Girls' Generation, TWICE, and SISTAR.

Which song is your favorite?