Sugarland 's been busy over the last month entertaining fans in the U.K. and Ireland with their "The Incredible Machine" Tour, and getting ready for a march kick-off here in Houston on March 3rd.

Not only have Jennifer and Kristian been entertaining raucous crowds of European fans, but they've also been documenting their journeys with blog diaries and videos. 

Included here is "Part 4:  Last Day in London."  They're pretty funny!  Watch as they talk about the 5-hour delay at London's Heathrow Airport and much more.