Jessies birth name is Jessica Ellan Cornish,She was born on the 27th March in 1988She is a English singer and songwriter her sucsessfull song she wrote is party in the usa.Jessie is writing tracs for singer called Chris brown and Miley cyrus on the 7th january jessie came top of the bbc sound of 2011 top list.You might think she is 17,18,19 but she is 23.