LeAnn Rimes’ alleged affair with her soap hunk co-star, Eddie Cibrian, helped make Northern Lights a ratings hit for the Lifetime Network over the weekend.

The Lifetime Original Movie, based on the best-selling novel by Nora Roberts, drew 4.5 million viewers on Saturday night – making it the most-watched movie of the year so far for the Network for Women.

LeAnn and Eddie, both married, have denied reports that they are secretly dating.