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The Capital Late Show With Marvin Humes 10pm - 1am
14 August 2012, 16:10
Watch the band treat fans to a special version of the song during a visit to Capital FM.
Lawson perform their debut single 'When She Was Mine' during a live session at Capital FM.
The track was the band's debut single and debuted in the top five of the Vodafone Big Top 40 earlier on 2012.
Lawson perform 'When She Was Mine':