Cardi B made one big promise to fans after giving birth to her fourth child last month, a son with NFL boyfriend Stefon Diggs: she would start hitting the gym as soon as she could to get in shape for her upcoming arena tour.

Cardi B made one big promise to fans after giving birth to her fourth child last month, a son with NFL boyfriend Stefon Diggs: she would start hitting the gym as soon as she could to get in shape for her upcoming arena tour.