Shortly after the sixth edition of the Nigerian Idol, she began working on Big Girl, with Jones Worldwide.

On June 9, 2021, Seyi Shay and Yemi Alade performed a live version of "Pempe" on Clout Studio.

In a review for ModernGhana, Agwuma Kingsley wrote "Big Girl is Seyi Shay being innovative, being versatile as well as cherry-picking the right set of creators to accompany her current state of mind.

The harmony of Big Girl is undeniable as much as the album sequencing, cohesiveness, proper record production, and the songwriting in particular".

But Calema and Shay Jones stand out from the bunch", and in conclusion, Motolani Alakehe said "the album suffers from a lack of obvious singles.