Conversation so far:
What was JLS's first television appearance?
As well as appearing on numerous TV programmes for promotion of their albums/singles, JLS have had two special TV shows of their own broadcast.
Did the specials have good viewership?
JLS have had two special TV shows of their own broadcast.
The first was an hour-long documentary for ITV2, titled JLS Revealed, which first aired on 7 November 2009.
What was the 2nd titled?
The second show was an hour-long entertainment show for ITV titled This Is JLS, which first aired on 11 December 2010.
Were there any comments about their appearances?
Due to many cinemas selling out.

Question: What happened as a result of many cinemas selling out?
Self-contained rewrite: What happened as a result of many cinemas selling out for This is JLS?