The teenager fell ill during the live shows last year and continued to be unwell before and after the X Factor Live Tour this year, which meant she had to reduce her singing. Even now, she says her voice is still croaky in the mornings.
That means she's spent more time on other opportunities, including YouTubing and presenting an upcoming TV show.
Speaking on today's ITV's Good Morning Britain, she said: "I have been singing a little bit but I had to take a back seat as I got really, really ill before and just after the tour. When I was on the show, really, but it wasn't picked up on very much.
"I took a back seat. I panicked at the time but I think it was a blessing in disguise. I love singing but I found other avenues I love too, like presenting. I've also started YouTubing and that's really exciting because obviously the platform I had in the first place from X Factor has completely blown up!
"And I have a new show on BBC in January called Got What It Takes? When they first asked me I said, 'Really? You want me to be a presenter? Really?!'"
Lauren finished in fourth place on the last series of X Factor, which was won by Ben Haenow. She was mentored by Cheryl Fernandez-Versini during the series.
She left school after the show to focus on her music dreams, and later said: "I wouldn't have done X Factor if I didn't want to win, but I don't think winning is everything. You don't need to win to have a career. I made it to the semi-finals and if I work hard it's going to be okay."