Are you allowed to sing songs from the musical wicked?

Yes, you are allowed to sing songs from the musical Wicked. The songs from the musical are protected by copyright, but the copyright only extends to the specific arrangement and recording of the songs. You are free to sing the songs yourself, or to perform them in a non-commercial setting, such as at a karaoke bar or a talent show. However, if you want to record or distribute the songs, you will need to obtain a license from the copyright holder.