Viewers might have seen double last night, as HLN’s 8 p.m. host Nancy Grace appeared on one of her competitor’s programs, Fox News Channel’s “The O’Reilly Factor.”

Grace was there to promote her new book Death on the D-List, but also spoke about the Arizona prison escapees currently on the lam.

Host Bill O’Reilly introduced her as an anchor with “a show about crime,” but decided not to mention the letters H, L or N, or that her program was on at the same time as his.

It doesn’t sound like the “Factor” was Grace’s last stop at Fox News either. A tipster tells us she is also scheduled to appear on Glenn Beck‘s program today. (Update: A HLN spokesperson tells us Grace is not appearing on Beck’s show.)

Grace also appeared on this morning’s “Good Morning America.” Video of that segment is after the jump.