She will headline the event, which will take place at a bigger and better venue this year, London’s Wembley Arena, on October 9th.
The Mama Do singer will also sit on the awards judging panel and select three Teen Heroes, nominated by Radio 1 listeners.
“I presented an award at the first Teen Awards last year and was moved by the stories I heard of some truly outstanding young people,” the singer said.
“I’m thrilled to be not just performing at this year’s event but also getting involved in selecting this year’s Teen Heroes.”
The idea behind the Teen Awards is that young people aged between 12 and 17 are recognised by their peers for having acted selflessly, courageously or inspired others.
Last year’s Teen Community Hero was Alex Williams, who caught meningitis when he was seven-years-old and lost the use of his legs. Now, he is an Olympic hopeful in the Paralympic Games’ wheelchair basketball event.
What’s more, their recognition will go hand in hand with some pop royalty, who will also be receiving awards, as voted for by Radio 1 listeners.
They include the best British single, album, TV show, music act and young sports star.
Pixie, who was nominated for three Brit Awards last year, this week stressed the importance of providing opportunities for young people.
“I know I’ve been lucky because I loved singing and dancing and my mum and dad could afford to send me to classes. A lot of families on council estates don’t have that chance to go to private lessons,” she told the Sun.
Supporting David Cameron’s call for a National Citizen Service, she suggested that the scheme could encourage teens to focus on their passion, “whether that is performing or computers or something else”.