Liam Payne had two special occasions to celebrate over the weekend: Mother's Day in the U.K. and his son's birthday.On Sunday (March 22), the former One Direction member took to social media to wish a happy Mother's Day to his mom, Karen, and to Cheryl Cole, with whom he shares 3-year-old son, Bear."Double special day today thanks to 2 very special ladies and a very special little man," he tweeted.