"Get them the gift that fits—cash!" Cardi B says in her new Christmas-themed commercial for Pepsi's Gift It Forward campaign Janine Rubenstein is Editor-at-Large at PEOPLE and host of PEOPLE ...

Overall, Stiller notes that working with Pepsi for the ad — the brand's first ... "She is incredible, she's so ridiculously funny," Stiller says of the Saturday Night Live alum.