In 2008, Cheryl replaced Sharon Osbourne as a judge for the fifth series of The X Factor alongside creator Simon Cowell, Dannii Minogue and Louis Walsh. She was given the girls category (made up of female solo contestants aged 16 to 25) and subsequently ended up as the winning judge when Alexandra Burke was crowned the winner of series five on 13 December. She returned for the sixth series in 2009 and was given the boys category (made up of male solo contestants aged 16 to 25). She was the winning judge for a second consecutive year when Joe McElderry won on 13 December. Cowell referred to her as "one of the best I've ever worked with." Cheryl returned for the seventh series in 2010 and mentored the girls category again. This was the first series in which she was not the winning mentor, when Rebecca Ferguson finished as runner-up to Matt Cardle, who was mentored by Minogue. In 2011, Cheryl joined Cowell, L.A. Reid, and Paula Abdul on the judging panel of the American version of The X Factor. After a three-week stint she departed the series. Cowell said that the reason why she left was because he offered her a place on the 2011 series of the UK version and he felt that she would have been more comfortable there. Cheryl did not return to the UK version, as Tulisa had taken her place on the UK judging panel. Nicole Scherzinger replaced her on the judging panel of the American version for the rest of season one. In December 2012, Cheryl sued the American producers of The X Factor for $2.3 million (£1.4m). She received $1.8 million (£1.1m) for the first season, and then sued for $2 million (£1.25m) for the second season, plus additional damages. In November 2013, Cheryl won for her settlement, for an undisclosed amount between her and producers Blue Orbit.Cheryl's first solo performance was on American rapper will.i.am's "Heartbreaker" in 2008. She was picked to appear as a dancer in the video after taking streetdancing classes during the filming of ITV2 series The Passions of Girls Aloud. She was later asked by will.i.am to sing additional vocals on the track. In April 2009, she started working on solo material, and her debut album, 3 Words, was released in the UK on 26 October. The album spent two weeks at number one, and on 6 November, BPI certified the album platinum, denoting shipments of over 300,000 units; it later tripled this feat. The first single from the album, "Fight for This Love", was written by Andre Merritt, Steve Kipner and Wayne Wilkins, and produced by Kipner and Wilkins. Following a performance on The X Factor live results show, "Fight for This Love" entered the UK and Irish charts at number one, and in 2010, it went to number one in Denmark, Norway and Hungary, and was later certified platinum in the UK. It also became the fourth best-selling single of 2009 in the UK. Cheryl's second single, "3 Words", which features will.i.am, went to number four in the UK and seven in Ireland. In 2010, the single was released in Australia and charted at number five, and was certified platinum. The third single, "Parachute", charted in the top five in both the UK and Ireland, and was certified gold in the UK.

Question: What was the first single called?
Answer: "Fight for This Love"