Well, this sounds like a recipe for a successful marriage if we've ever heard one: Divorced woman, 29, gets engaged to the 25-year-old guy she's been dating for less than seven months. Yes, Ashlee Simpson is set to get married again, this time to Evan Ross, People reports. Ross is the son of Diana Ross; he's apparently already gotten close to Simpson's 5-year-old son with ex-husband Pete Wentz. Simpson announced the happy news on Twitter last night: "My baby love and I are ENGAGED!!! Hallelujah Hawaii !!!!!"