Into You Ariana Grande
Louisa initially audition for 'Britain's Got Talent' in 2014, but was unsuccessful. However, a year later, she appeared on 'The X Factor' singing 'Who's Lovin' You?'. Mentored by Rita Ora, Louisa went on to become the youngest winner ever, overtaking Joe McElderry.
Did you know?
Johnson is a supporter of Premier League football team West Ham United.
She has attributed her unsuccessful stint on 'Britain's Got Talent' to being too young and unprepared.
First Single: 'Forever Young'