At the 2010 Youth Olympics in Singapore, Lim finished 6th in the 50-metre freestyle in a season best time of 26.05, 11th in the 100-metre freestyle in 57.99, 13th in the 200-metre freestyle in 2:04.68 and 16th in the 50-metre butterfly in 29.34. In the 4 × 100-metre freestyle relay, Lim with Adeline Winata, Chriselle Koh and Cheryl Lim finished 8th in 4:00.43 and in the 4 × 100-metre medley relay, the same quartet finished 10th in the 4 × 100-metre medley relay in 4:28.56. In the mixed 4 × 100-metre freestyle relay, first ever mixed-gender relay for Olympic-level swimming, Lim with Winata, Clement Lim and Arren Quek finished 12th in 3:42.88.