Conversation so far:
What happened in 2009?
DSP announced that it would commence voting on January 28 at the group's official website for the follow-up single to "Pretty Girl".
what did they vote on?
the follow-up single to "Pretty Girl", which ended on February.
was the single successful?
"Honey" was the clear winner, with 60% of the votes.
what was revolution?
full album, Revolution, available online on July 30.
was tha album popular?
Kara's overall popularity increased, evidenced by an influx of advertisement requests by various companies; in.
did they do commercials?
CANNOTANSWER.
what advertisements did they do?
they had more advertisements in October 2009 than they had had the previous two years.
did they produce any music videos?
Their single "Wanna" was released on July 28, 2009 and immediately charted on various digital music charts.
The music video was released on July 29.

Question: did they have any failures or setbacks?
Self-contained rewrite: did Kara have any failures or setbacks?