Music
Rex Features
The 20-year-old told The Sun that she has never performed at gigs like those she will play with the band in May.
Deigman said: "I have been a huge fan of Girls Aloud for some time. As well as being brilliant singers and performers, their records are clever and innovative with a really unique sound."
"It's an honour to be asked to be one of their supporting artists. I have done a lot of shows in and around London but never to such large audiences."
Deigman released her debut single 'It Was You' on Monday.
> Click here to watch the new Girls Aloud video for 'Untouchable'
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