Jen & Liv participated in the twelfth series of The Voice UK in 2023. In their blind audition, the show's four coaches (will.i.am, Anne-Marie, Sir Tom Jones, and Olly Murs) turned their chairs. Ultimately Jen & Liv decided to join will.i.am's team. The duo has the distinction of being the first participant in the history of the show to have had the show's presenter, Emma Willis, press coach will.i.am's button, as will.i.am and Willis decided to swap places for the audition. They were declared the winner of the series in the series final on 30 December 2023.[4][5] After winning the series, the duo's winning single, "I'm Every Woman", was released.[6] For winning the series, the duo won £50,000 and a holiday to Mauritius.[7]
Jen & Liv announced in February 2024 that they were to change their name as a duo after signing to Universal Music Group. The duo were later re-branded to HUNNI, updating their social media usernames and explaining that new music is on the way. The duo performed at Mouth Of The Tyne Festival on 14 July 2024, and supported Gabrielle at her Durham Cathedral show on 21 July 2024.[8]
On 19 April 2024, HUNNI released the song "Heartbeat".
On 18 October 2024, HUNNI released the song "5 + 5". On 26 October 2024, they returned to The Voice UK stage to perform "Heartbeat" at the finale of the thirteenth series.