Watch Louis Tomlinson Perform His Debut Solo Single — a Tribute to His Late Mother

Days after his mother passed away from leukemia, Louis Tomlinson courageously returned to the X Factor UK stage to debut his first solo single. Titled "Just Hold On," the song seems to memorialize this difficult moment in his life.

Moments before taking the stage with Steve Aoki, Louis thanked his fans on Twitter before saying, "Let's do this together tonight."

According to The Telegraph, Louis was determined to perform because it's what his mother wanted. In a series of tweets following the performance, Louis said, "Mum would have been so f*cking proud." Adding, "Sorry for swearing mum."

While Louis held it together during the duration of his uplifting performance, he later tweeted that it was harder than he could have imagined. The former One Direction singer also appeared emotional as Simon Cowell applauded his "bravery." Cowell said, "What you've just done — the bravery. I respect you as an artist and I respect you as a person. Your mum was so proud of you, Louis, she was so looking forward to tonight, she's watching down on you now and you've done her proud."