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30 March 2012, 14:26 | Updated: 30 March 2012, 14:49
The 'On Your Radar' star has described the band's debut single as a "tune".
The Saturdays star Mollie King has named Lawson's brand hew single 'When She Was Mine' as her favourite song of the moment.
The 'All Fired Up' singer tweeted her appreciation to the four-piece band earlier this week, ahead of the first play of their first ever single earlier this morning (30th March).
"My favourite new song @Lawsonofficial - check it out Team Sats," Mollie tweeted to her followers on Twitter. "@tbrown100 It's a TUUUUNE!! Lots of love xxx."
Lawson fans have hailed 'When She Was Mine' as "amazing" and got the hashtag #LawsonOnCapital trending number one in both the UK and worldwide.
Earlier today The Saturdays also premiered there brand new single '30 Days', taken from their upcoming fourth studio album, with a special lyrics music video.
Listen to Lawson's debut single 'When She Was Mine' below: