The four remaining acts competed in the third heat on 24 January 2009. All contestants were also accompanied by a 17-piece band during their performances. In addition to their performances, the female contestants performed The Pretenders' song "I'll Stand by You", while the male contestants performed Elton John's song "Don't Let the Sun Go Down on Me". Guest performers were Lulu performing the winning song for the United Kingdom in 1969 "Boom Bang-a-Bang", and singer-songwriter, rapper and dancer Alesha Dixon performing the song "Breathe Slow".