J.Lo's Marathon Sprint ... Across the U.S.

9/15/2008 10:12 AM PDT BY TMZ STAFF
Jennifer Lopez finished her first triathlon on Sunday morning in Malibu and immediately did what anyone else would do -- she flew across the country to NYC to celebrate her little husband's 40th birthday!
Jennifer Lopez
From wet suit to a gown in under six hours -- that's a new world record.