Jessie J has thanked her fans for their support over the last two years.

The vocal star is set to play the iTunes Festival in London tonight (September 21) and it will mark her debut album's tour cycle coming to an end.

She released the record 'Who You Are' in 2011 and work is beginning on her next album, ushering in the next era of Jessie J. The singer tweeted to fans today:

"I have woken up with a wave of different emotions for tonights gig...@itunesfestival. Tonight is the last gig for this year where I will be performing a full set of songs from my album 'Who you are'."

She continued: "I want to say THANK YOU to every single person who has come to watch me live in the last 2 years to see me sing songs from 'WHO YOU ARE'. Your support, generosity, love, banner making, loud cheering, camping outside, screaming, high jumping, singing along to every word, T shirt wearing, fan book making, laughing to my bad jokes, has NEVER gone unoticed. The love in my heart for my fans in unconditional."

The Voice UK coach then told fans to expect even more concerts when her next album arrives, adding: "Album two will be 100's of gigs, I know you all will make it as special as the first album. We are on a journey :) Tonight is a big night. Thank you for sticking with me through it all. Music brings people together. Love the people you have in your life BUT play the music LOUD! You really have made my dreams my reality... I am so grateful you all believe in me."

Watch Jessie J perform live earlier this year below: