Songstress and influence Sister Derby is in a celebratory mood as she climbs unto the fourth floor.

She marked the milestone by sharing sultry photos of herself, looking absolutely stunning in a futuristic black outfit paired with a bold, hot red wig.

Her bold and sassy attitude, combined with her striking appearance, has left many people taking notice.

In her birthday post, Sister Derby expressed her gratitude to God for allowing her to reach her fourth decade of life.

She also couldn’t help but brag about how fabulous she looks at 40; good physique, clear skin and a bag of confidence.

Sister Derby’s birthday celebration has been making waves on social media, with friends, fans, and followers showering her with love and admiration.