Watch: Jessie J performs Ain't Been Done at Summertime Ball 2014

Singer Jessie J performed at the "Summertime Ball" festival last weekend, promoted by the British radio Capital FM.

The artist surprised fans by performing her new song "Ain't Been Done", which had already been performed in some of the UK shows.

The track will be included on her as-yet untitled third studio album, which has already been completed but no release date has been set yet.

Besides the new song, the artist also performed "Calling All Hearts (Feat. Jessie J, Robin Thicke)" next to Nathan Sykes of The Wanted.

Check out the live performance of “Ain't Been Done” below: