When you know, you know! And that's obviously the case for Ashlee Simpson and Evan Ross. The couple got engaged on Monday with both parties announcing the news through Twitter. The pair went public with their relationship back in July, but has since been seen getting to know each other's families. Ashlee's soon to be mother-in-law is none other than the legendary Diana Ross. So, who do you think will get married first - Ashlee or Jessica? Take a look!