The singer said that she "went through some things" during her three years away from the spotlight but is proud of her upcoming LP All Of Me.
"I had to write the songs and go through some stuff and I definitely went through some things and the album has all of me," she told Metro.
"It's everything. It's happy, it's joy, it's pain, it's sad, it's crying, it's jumping for joy, it's a mess."
Estelle's last record Shine peaked at number six on the charts in 2008 and featured the chart-topping single 'American Boy'.
Her new single 'Back To Love' - which features on this week's Digital Spy Playlist - is out later this year. Watch the official music video below: