The network advertised the series with some raunchy billboards, one of which was right outside Kimmel's office.
He managed to get hold of one part of the billboard, which showed Jennifer's cleavage in close-up, and had it brought out onto the stage.
Jennifer's reaction to seeing the huge square: “It looks like a horror movie blown up," she laughed. "My boobs!”
Watch "The Client List" every Sunday at 10 p.m. ET on Lifetime. "Jimmy Kimmel Live" airs weeknights at 12 a.m. ET on ABC.
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