 This was only slightly higher than the average primetime audience of 216,000 the channel had as Discovery Health.On January 26, 2012, Lisa Erspamer resigned from OWN; she was replaced in the interim by veteran Discovery executive and former TLC vice president Rita Mullin.A March 2012 "Oprah's Next Chapter" interview with Whitney Houston's daughter Bobbi Kristina Brown and her family (following Houston's death in February) became OWN's highest-rated single program to date, with 3.5 million viewers.