Selena Gomez was reportedly spotted backstage with Niall Horan at the UK version of 'The X Factor'. The 23-year-old beauty and the One Direction singer have been romantically linked in recent weeks and although they've continually rubbished the rumours, the sight of Selena mingling with Niall and the rest of the chart-topping band is sure to heighten speculation about their relationship status. The former Disney star was seen mingling with fans and a few of Niall's friends at the show, according to E! News. The show itself featured a special performance from One Direction and a video tribute to the band, who are taking a break in 2016. Earlier this month, Selena admitted she thinks Niall is "amazing", but insisted they are definitely not dating. Asked if they're a couple, Selena said: "Oh my god! No [but] I love him, I always have. He's amazing." Selena has also been romantically linked to her ex-boyfriend Justin Bieber after he was recently seen serenading her at a bar. However, a source claimed she is "terrified" of trusting him. The insider said: "Selena is still in love with Justin, but as exciting as it is for them to be back together, she's terrified to trust her heart again because he's hurt her so many times. "Justin has this belief that Selena's cool with him hooking up with other women and that they don't need to be exclusive. She may say it's OK, but in reality it tears her apart to know he's seeing other girls."