The 2007-2009 Cadillac Escalade tops the 2010 vehicles most likely to be stolen list compiled by the Highway Loss Data Institute. It appears that 10.8 Escalades are stolen out of every 1,000 Escalades - a risk of theft five times higher than average.
The MINI is among the least likely to be stolen (and, hence, one of the cheapest to insure).
[Source: via Ridelust]