Derby was one of the musicians scheduled to perform at the weekend-long Legon SCR Pent Invasion event.
As she showed her bottom in a flimsy baby dress, Sister Derby mounted the stage to create all the tension.
She had a lengthy dress covering her up before going on stage, but she swiftly removed it for the big surprise of showing her butt.
As they focus their attention on her, the students can be seen cheering with delight.
Social media users are currently responding to the footage. Despite her age, fans are criticizing Derby for leading an immoral lifestyle.
She was always using n*dity to get attention. When will she mature?