Ratajkowski, who stars alongside Amy Schumer in upcoming comedy "I Feel Pretty," teamed up with Fallon, while Hamm played with Tarik Trotter, the lead MC of The Roots.
Fallon went up first, having to act out the song, "I Am The Walrus," into which Ratajkowski figured out very quickly. The team began to celebrate, but Hamm reminded them he was not backing down. "You got one point...that was an outsized reaction," he joked.
For the final round, or "Charade Showdown" both Ratajkowski and Hamm went up to act out Beyonce's "Drunk in Love." The Emmy-winning "Mad Men" star went to tackle the third word first, when the model went for the first.
Trotter might be the music man, but Fallon guessed Queen B's hit first. There were no hard feelings, though. "We're all winners!" Hamm yelled, as the whole group jumped up and down while holding hands and cheering.