Behold the power of three: two married stars are constantly inviting "guest stars" over, another couple broke up because of a third, and a knocked-up actress is in a triangle with two fathers. On the count of three...

1. "This married celebrity couple used to fight like cats and dogs whenever one found out that the other was being unfaithful. However, they have come to a rather unusual arrangement which seems to satisfy them both. She is allowed to invite to invite a friend for a sleepover… as long as he gets to watch. He is allowed to invite a friend for a sleepover… as long as she gets to join them. Not a perfectly even relationship, but it seems to be working for them." [Blind Gossip]

2. "These two stars who recently broke up, did so because of a third party. It's not what you think though, no affair. The third party would like it to be an affair, but so far nothing has happened. Instead, the third party was a big trouble maker in the relationship of the star-crossed pair and played the two against each other, sent steamy text messages to cause trouble and tried other antics to get the two to split. Not Jessica Simpson." [BuzzFoto]

3. "This long haired B-/C+ list movie and television actress kind of hops between one and the other. She is also a huge publicity hound. She loves to see pictures of herself. Anyway, at a party over the weekend she was drinking and smoking joints and even did the odd line or two of coke. While she was partying she told all the people around her that she was also pregnant and she had it narrowed down to two people. She didn't really care who got her pregnant she just wanted to know which one she should ask to pay for the abortion." [CDaN]