These days, modern relationships last as long as the latest runway fashions – and sometimes even less time. Sexy Sienna Miller stuck around long enough to be the last straw in Balthazar Getty’s shaky marriage but now what’s the deal with these two?

After the major scandal their relationship caused, seems Sienna and Balthazar are through. Back in July, Sienna was seen topless and kissing Balthazar on a boat in Italy (Getty is the great grandson of oil mogul Jean Paul Getty). After pics of the duo came out all over, Balthazar split from his wife Rosetta, who is the mom of his four kids. Now that the marriage is over, apparently so is the summer romance between Sienna and Balthazar. Sienna says to US mag, “I’m single at the moment, and I’m completely happy with that.”

Wonder if Sienna is in the market for a new type of relationship? Either way, sultry Nicole Kidman is hot playing the world’s first post-operative transsexual in the movie “The Danish Girl.” Even hotter, in the flick Nicole is married to Charlize Theron. Both stars earned best actress Oscars playing lesbian characters so there should be some serious sparks here…for them and for everyone watching.

An unauthorized biography is out about Tom Cruise, penned by Andrew Martin who brought us other unauthorized tales about Princess Diana and Monica Lewinsky. The book discusses Tom’s marriance to the now apparently pregger Nicole Kidman, his daughter Suri and the brief fling he had with Penelope Cruz. Word also reports that because of Cruise’s dedication to Scientology, he consults the religion’s leader, David Miscavige, on “every aspect of planning and policy” with regard to his career.

Allegations made in “Tom Cruise: An Unauthorized Biography” include the suggestion that L. Ron Hubbard’s sperm was used to inseminate Katie Holmes so she could give birth to Suri. Apparently Nicole Kidman’s Catholic ideals and the fact daddy was a psychologist was compromising Cruise’s Scientology beliefs and in return, Nicole was afraid her children would be kept from her by the Church of Scientology. Rumor has it that Cruise is trying to romance the Beckhams into Scientology. There is also word about his brief liason with Penelope Cruz and that her dad was worried about it, fearing his daughter would be lured in the Scientology “cult”. Of course, now Penelope Cruz is promoting her brother Eduardo’s (namesake of daddy) new erotic music video by getting dirty with her sister and getting in a lip lock with Mia Maestro, the Argentinian actress (guess that kind of behavior is alright, as long as it’s in the name of family). Anyhow, Cruise attorney Bert Fields says the bio is a “pack of lies” and Tom has “no intention of reading it. He’s very, very busy with a lot of things right now.” Well, bloggers are sure to check it out for him…

Jamie Lynn Spears being pregger at 16 seems to be on everyone’s lips. Mike Huckabee, GOP front-runner, a former Baptist minister and a pro-life candidate recently said about the pregger teen, “I think that is the right decision, a good decision. I hope it is not an encouragement to other 16-year-olds who think that is the best course of action.” Is everyone this confused?

Blame is also being thrown around and it seems the finger is being pointed at mommy Lynne. Alexa Nikolas, co-star with Spears in ‘Zoey 101′ recently stated, “Jamie wanted something different for her life and her mom put her in situations she didn’t want to be in.”

Another source told Us Weekly that Lynne, who is also manager for the Spears girls, “treats her girls like a piggy bank” and that “Lynne got all her money through those girls and loved it when it started rolling in. She’s the only one with a Land Rover in Kentwood.” Oddly enough, infamous Dr. Phil McGraw recently told People magazine, “An asset that Britney and Jamie Lynn both have is a great and dedicated mother.”

On the other end of the spectrum, everyone is speculating whether 40-year-old Nicole Kidman is preggers…further word on that front soon…