Inbetweeners Movie
Paul
Team America World Police
The Hangover Pt II
Alpha Papa
Paddington 2
Stepbrothers
Paddington
American Pie
Meet The Parents
So there was a reasonable number of films from 21st C. None of these are still in it - some missed out cos of the random grouping - but I agree, it's a bit odd. Maybe people always consider their favourite film to always be an oldie (except Constanza's love for Paddington 2), Dunno why.
And the least said about Carry on Screaming the better.
My 2 suggestions were both made when I was about 1. I don't see the relevance of when it was made, in my opinion there has been nothing made that is better than them both before and after.