Everyone loves a great luxury watch. You invest your money into one and have something that will last you your entire lifetime. But some watches can go far beyond the typical luxury watch price tag. The list of the world's most expensive luxury watches changes often as new models are released, seemingly with the idea to gain a spot on that top list. As of 2011, these are the top 5 most expensive models.

201-carat Chopard, $25 Million - currently the most expensive watch available, its band is encrusted in pink, blue and white diamonds, including a single 163-carat diamond. It all adds up to 201 carats which is precisely how it got its name. This may be the watch you display behind a case and security system at home, not walk around with!

Patek Philippe's Supercomplication, $11 Million - An 18 carat hold pocket watch made in 1932, this watch took four years to produce. It set a record for the most expensive pocket watch when it was sold in 1999 through an auction for $11 million. Talk about a conversation piece!

Patek Philippe's Platinum World Time, $4 Million - This watch was purchased in an auction in 2002 and at the time it's price of $4 million made it the most expensive wrist watch, though it's obviously been beat out for that title since then. What makes it so special is that it displays times zones of all countries and distinguishes between day and night in each time zone.

Vacheron Constantin tour de L'Ile, $1.5 Million - Claimed to be the most complex watch ever made by a human being, it has 834 parts and takes up 1000 hours of production time. The watch has two faces, with the back displaying the time much the same as the front.

Patek Philippe's Sky Moon Tourbillon, $1.3 Million - With 688 parts, this watch is pretty complex in itself. It's casing is made up of platinum, one of the most expensive materials used for watches. The back of the watch has a beautiful face of the night sky. Only two watches are produced each year, a platinum version and a rose gold version.

You can see that some of these models once held the top spot, but got pushed down by other companies trying to outdo others or even, in Patek Philippe's case, themselves. Every year, as new designs are released, the list is changed. But for now if you are looking to spend a couple of million on a watch, these are the ones to get.