The 27-year-old singer along with Plan B will help 10,000 youngsters from her hometown, Hackney, with lessons in music, acting, fashion and radio, reported Contactmusic.
"I grew up in Hackney and when I heard about the initiative, I wanted to get involved. Young people relate to us more than politicians, especially with us coming from around here. It is important for us to come back and help and support those in the community who are doing amazing things," Lewis added.
Lewis and the rapper, 29, will work with kids aged 13 to 15 from the Pupil Correction Unit in Newham to create a special musical performance for the forthcoming Hackney Weekend festival.