Paula Abdul has opened the floodgates. Nigel Lythgoe is facing more sexual assault allegations as he was slapped with a second lawsuit by two contestants from the short-lived competition show All American Girl, RadarOnline.com has learned. The women — who have filed under Jane Doe pseudonyms — accused Lythgoe of showing up on the set and in the dressing rooms where he allegedly “openly swatted and groped” their butts. They also claimed that Lythgoe, a producer on the 2003 program, insisted that one of the girls ride with him to the studio to meet the rest of the cast after their wrap party. Th…