Katie Melua is to get married on Saturday (01.09.12).

The 'Nine Million Bicycles' singer will tie the knot with two-time World Superbike Champion James Toseland this weekend sources have confirmed to Smooth Radio, and the brunette beauty was spotted looking very happy when she came out of a bridal shop in south east London earlier this week.

An announcement on the UK station revealed: ''It's been confirmed to Smooth Radio that Katie Melua is getting married on Saturday.

''She's to tie the knot with former World Superbike Champion James Toseland.''

The venue for Katie and James' big day is yet to have been unveiled, but the 27-year-old singer is ''very excited'' about her forthcoming nuptials.

A fellow customer at the Blackburn Bridal shop in Blackheath told the MailOnline: ''She was very happy and smiley when she came out of the shop with her mum.

''She'd been in there for a couple of hours. She stopped to talk to us and said that she was very excited about her wedding, which was very, very soon -- but she didn't tell us the exact date.''

Katie and James got engaged in January after the former MotoGP star - who was forced to quit the sport in September 2011 after suffering a wrist injury - popped the question.

He wrote on his Facebook page at the time: ''I asked Katie to marry me and she said yes. As you can imagine, I am a very happy man right now!''

The couple have been together since April 2011 after meeting at one of Katie's concerts in Sheffield, South Yorkshire.