Conversation so far:
What happened regarding South Korean group Kara in 2009?
At the end of January 2009, DSP announced that it would commence voting on January 28 at South Korean group Kara's official website.
What did the DSP vote on regarding South Korean group Kara at the end of January 2009?
The vote was for the follow-up single to Pretty Girl, which ended on February 2.
Was the South Korean group Kara single Pretty Girl successful?
The teaser video and music video for South Korean group Kara single Pretty Girl were well received by the public.
What was revolution by Kara?
Revolution is the second Korean album by the South Korean pop girl group Kara.
Was the album Revolution by South Korean group Kara popular?
South Korean group Kara's album, Revolution peaked at position 86 on the Japan Weekly Oricon charts.
Did the South Korean group Kara do commercials?
South Korean group Kara released their Japanese single titled 'Go Go Summer', which was used for the commercial and was promoted at the same time.
What advertisements did South Korean group Kara do?
South Korean group Kara has endorsed online games, clothing, food & beverage, cosmetic products as well as shoes.

Question: did they produce any music videos?
Self-contained rewrite: Did the South Korean group Kara produce any music videos?