Out of Control is the fifth and final studio album by English-Irish girl group Girls Aloud, released in the United Kingdom on 3 November 2008 by Fascination Records. Like their previous albums, it was crafted by the production team of Brian Higgins and Xenomania. Out of Control builds on the sound of Girls Aloud's previous albums and represents a move into the mainstream for the group.
 
Out of Control debuted to positive reviews from contemporary music critics. The album debuted at No. 1 on the UK Albums Chart, Girls Aloud's first studio album to do so, and quickly became Girls Aloud's best-selling studio album. It was certified 2x platinum in the UK and Ireland. It yielded three singles, including chart-topping "The Promise", which was awarded Best British Single at the 2009 BRIT Awards.
 
Out of Control debuted in the Irish Albums Chart at No. 7, the highest debut of the week and their second highest charting in Ireland. It debuted in the UK Albums Chart at No. 1. This is their first studio album to achieve the coveted No. 1 position. The album Girls A Live also entered the UK Albums Chart at No. 29. Out of Control spent five weeks in the UK top five overall, and three additional weeks in the top ten. In the top ten albums chart of 2008, Out of Control came first, selling nearly 600,000 copies within just two months. On 4 January 2009, The Sound of Girls Aloud: The Greatest Hits re-entered the charts at No. 6 while Out of Control was No. 10, thus giving Girls Aloud two top ten albums at the same time.
 
Out of Control has sold over 800,000 copies.