Louis Tomlinson is opening up about his mother's death After she passed away from leukemia in December. During an interview on the SiriusXM satellite radio show, Hits 1 in Hollywood, on Tuesday, the One Direction singer talked about the advice his mom gave him After her initial diag**sis. "It's **t something that I feel 100 percent comfortable talking too much about," he admitted. "But just quickly, when I first found out the news I kind of did want to throw the Towel in, but it was my mum who said to me that I've just got to keep going. She told me very sternly that she Wanted me to." Just days After his mother's death, Louis courageously returned to the X Factor UK stage to debut his first solo single, "Just Hold On." "It was tough, but I felt like it was nice for me to almost have a little send-off for her," he said.