Bullying through online medium has afflicted many adolescents to cause severe mental health concerns, including self-harm and suicide. The aims of this study are to examine the prevalence of cyberbullying in Singapore adolescents, its associations with psychosocial difficulties, and how do the adolescents seek help after being cybervictimized. A representative sample of 3,319 school students aged between 12 and 17 years responded to a survey with scales measuring cyberbullying, psychosocial difficulties, and help-seeking behaviors. In the present study, 7.3 percent of adolescents reported being cybervictims only, 1.8 percent were cyberbullies only, and 4.8 percent were cyberbully-victims. Compared with the non-involved group, both cybervictim and cyberbully-victim groups were associated with more internalizing problems, but all the three cyberbullying-involved groups were associated with higher externalizing problems. Approximately half of the cybervictimized participants reported that they have sought help, with most of them (81.7 percent) choosing to tell their friends. Our findings are consistent with previous overseas studies showing increased associations of psychosocial difficulties among adolescents who are involved in cyberbullying. Public awareness of the consequences of unhealthy cyber-usage could be raised to aid in the early detection of cyberbullying among school children and adolescents. Moreover, cyberwellness programs should be considered as a component of larger anti-bullying programs in schools and in the community.