The Buddha statue when Rory walks into the house is the one from Lane's wedding.
Rory mentions, as an example of mistakes made by Gwyneth Paltrow, a movie where Gwyneth played a flight stewardess. For the record, the name of that 2003 movie was "View From The Top," which got terrible reviews and bombed at the box office.
The episode title is a line from the jazz/blues song Makin' Whoopee ("But don't forget folks, that's what you get folks,
for makin' whoopee"). Popularized by Eddie Cantor in the 1928 musical Whoopee!, it has been covered by Louis Armstrong, Ella Fitzgerald, Frank Sinatra, Bing Crosby and Doris Day, among others.