Molly Smitten-Downes from Rothley in Leicestershire could sing before an audience of 120 million people during the Eurovision Song Contest in May.
She is a relatively unknown artist compared to some previous performers: last year Bonnie Tyler came 19th and Engelbert Humperdinck was 25th out of 26 acts in 2012.
Molly said: "I'm so excited for everyone to hear Children of The Universe. I'm so happy with it.
To represent the United Kingdom in such a huge competition, not only as a singer and performer but as a songwriter is an unbelievable honour. I hope I can do us proud."
More top news
A giant statue of Mansfield swimmer Rebecca Adlington has been unveiled in London ahead of the Rio Olympics.
Nottinghamshire Wildlife Trust have been working to help otters return to their former home since the late 1990s.
More than 130,000 people in the Midlands are living with dementia, and around 5% of them are under the age of 65.