Vjtorley, UD contributor, has written an enormous thing about an article that explains how it is consistant to be a young earth creationist and still have millions of years old stars. In it he says that invoking a multiverse, a scenario in which there are an infinite number of "universes" in which everything that can happen does happen, does not disprove the existence of God. The number of universes where everything was created in 6,000 years is infinitely greater than the number of 13.7 billion year old universes. When you're dealing with infinities, the number of nonparsimonious universes is infinitely larger than the number of parsimonious universes, so the likely hood that we inhabit a nonparsimonious universe, like say one that's 6,000 years old yet has seemingly billion year old stars, is infinitely greater than the likelihood we inhabit a parsimonious universe. When you deal with infinities you have to throw parsimony out the window. Also, having a multiverse that's been around for 6,000 years yet still has infinitely many universes that were all created 6,000 years ago still has that pesky infinity problem to get around.
The whole UD piece is monstrously long and involves many more points than I could possibly add to this summary, so I'll just skip to the end: "I conclude that a skeptic who wishes to deny the reality of God by positing a multiverse containing an infinite number of universes is engaging in scientific and intellectual suicide. Such a skeptic no longer has a reason to believe in a 13.7 billion-year-old universe which unfolded in an orderly fashion, without any changes in either the laws of Nature or the constants of Nature. Indeed, the multiverse destroys the skeptic’s arguments against a 6,000-year-old universe. And finally, the multiverse fails to rule out God anyway – for you could always say that God created it." (bold and italics in original)