Watch Melissa McCarthy beat Jimmy Fallon in a Lip Sync Battle

DETROIT – Melissa McCarthy took over the "Tonight Show" on Monday with a domination Lip Sync Battle performance against host Jimmy Fallon.

Fallon started off the battle with "Brand New Key," but McCarthy countered with DMX's classic "Gonna Give It To Ya."

The actress finished off Fallon with her final song -- from the "Pocahontas" soundtrack.

Watch the battle here, or below.