"It was amazing I got to work every single day with Cameron Diaz and Leslie Mann, who are some of the most inspirational women and so kind, so talented."

Upton, who plays the "other woman" in the film, added, "They had humongous roles in this� I really appreciated everything they did." Upton had a blast hanging with Cameron and Leslie off set, and joked, "We were quite the power couple us three."

Kate's latest role is Gillette's team captain for "Movember." "It's an amazing cause, its where guys grow mustaches during all of November and it's for prostate cancer," she explained.

Upton's new beau Maks Chmrkovskiy has facial hair, but she doesn't think all men should. "I think whatever a guy feels confident in is their best look," she said. "I mean I don't really let people tell me how I feel confident and so I don't intervene in there."