Drew Barrymore New York Going The Distance Justin Long The Late Show with David Letterman black pants dirty blonde

Drew Barrymore's 35 years old but don't you totally forget that when you see how hip and hot she looks here?!

DB hit up David Letterman last night and, not that a 35-year-old can't look hot, but with Drew's ruch-waisted trousers, sexy top and heels, the girl looks like she's 25!

One thing we're not sure we understand ...