By Aly Semigran
Jul 18, 2014 @ 12:35 pm; Theo Wargo/NBC/Getty Images

Fashion isn't always as simple as black and white, but it was for Cameron Diaz as the did the rounds on the late night talk shows this week. The Sex Tape actress stopped by The Tonight Show Starring Jimmy Fallon wearing an ivory suit from Boy by Band of Outsiders, which she paired with a gray Rag & Bone tank and strappy black Cedric Charlier shoes (above, right). Her look turned out to be as sensible as it was sharp considering she participated in some land kayaking with Fallon.

However, for her visit to Conan on Thursday night, Diaz went for an edgier ensemble with a shiny LBD (above, left). Diaz—who appeared on Conan with her Sex Tape co-star, the now svelte Jason Segel—completed the rock star look with a loose ponytail. Both outfits from her talk show appearances felt like essential Diaz—smart and sexy twists on classic pieces.

Watch her chat with Conan O’Brien below, and tell us which Diaz look you preferred: her airy summer suit on Fallon or her shimmering short black dress on Conan?

Plus, see Diaz's best looks ever in our gallery!