In 2017, Barker was announced as one of the professional dancers for the first series of the Irish version of Dancing with the Stars.[4] She was partnered with Big Brother UK runner-up, Hughie Maughan.[5] They were the first couple eliminated from the competition.[6]
In 2018, Barker was partnered with Olympic medal-winning race walker, Rob Heffernan.[7] They reached the quarterfinals of the competition, eventually finishing in fifth place.[8]
In 2019, Barker was partnered with actor, Johnny Ward.[9] They reached the final of the competition, eventually finishing as joint runners-up to Mairéad Ronan and John Nolan.[10]
In 2020, Barker partnered, former Kilkenny hurler, Aidan Fogarty. They reached the final, finishing joint runners-up to Lottie Ryan and Pasquale La Rocca. This was Barker’s second time in a row to reach the final, making her the second professional dancer to do this.
In 2022, Barker partnered former RTÉ newsreader, Aengus Mac Grianna.[11] They reached the fifth week of the competition, finishing in 10th place. On 10 March, it was announced that Barker would partner Jordan Conroy for week 10 when his regular professional partner, Salome Chachua, tested positive for COVID-19.
In 2023, Barker partnered RTÉ 2fm Breakfast presenter, Carl Mullan.[12] They reached the final and won the competition, making this Barker's first win since she joined the show in 2017. Barker also became the first professional dancer to make three non-consecutive finals. On 5 September 2023, Barker announced via Instagram that she was leaving the show.[13]
From 2016 Barker was in a relationship with fellow Dancing with the Stars professional dancer, Curtis Pritchard. In early 2019 it was reported the couple were no longer an item.[14][15][16][17] In late 2019, Barker and her Series 3 celebrity dance partner, Johnny Ward, confirmed they were an item. They ended their relationship in March 2020.[18][19][20]