Girl group Kara is a female music group from South Korea, founded in 2007. They are loved by fans for their unique music style and excellent stage performances. Here are some of Kara's most popular songs:

1. "Mister": This is one of Kara's masterpieces and one of their most popular songs. The song, released in 2008, combines elements of pop, dance music and electronic music, and the lyrics express the desire and pursuit of love.

2. "Step": This song was released in 2008 and is another Kara classic. The song features strong rhythm and dynamic dance, and the lyrics convey a positive message, encouraging people to face difficulties bravely and move forward.

3. "Lupin": This song was released in 2009 and is the title song of Kara's third mini-album. The song features a brisk tempo and energetic melody, and the lyrics tell a story about adventure and freedom.

4. "Pretty Girl": This song was released in 2010 and is the title song of Kara's fourth mini-album. The song is based on a popular dance music style, and the lyrics express praise and confidence for beautiful girls.

5. "Jumping": This song was released in 2011 and is the title song of Kara's fifth mini-album. The song features a cheerful rhythm and energetic melody, and the lyrics convey a positive message, encouraging people to bravely pursue their dreams.