The party-loving pair are said to ended their relationship just nine months after getting engaged. Sarah, 29, reportedly fled to Ibiza last week in a last ditch attempt to try and salvage their relationship but ended up splitting up from the DJ.

A source said: ‘Sarah and Tom had a huge bust-up and told each other the wedding is off.’ They added: ‘They’ve always had a volatile relationship but this time it’s far worse.’

‘It’s a shame as they do really love each other but pals can’t see how there can be a way back form this.’

The couple began dating in June 2007, shortly after the Girls Aloud singer split from showbiz journalist Joe Mott.

And despite a turbulent relationship, which saw the couple split briefly on a number of occasions, including a fleeting one-week split in June 2008, the pair became engaged on New Year’s Eve last year when Tom proposed during a holiday in The Maldives.

In March the couple celebrated their engagement with a party at the Brompton Club with their friends and family. However Sarah has appeared strained in recent months and even suffered a meltdown while backstage before appearing on Chris Moyles Quiz night last month.

A source said: ‘She was crying hysterically and having tantrums. Chris was shocked – they had to pause filming to calm her down. Her band mates are worried she needs to sort herself out before going on tour.’

And at the time a spokesman for Sarah said: ‘She had a personal problem and was emotional but she’s fine now.’