When Whitney is placing the purse with the replica necklace on the table, she is wearing Birkenstock shoes. When her name is announced to perform a dance, she is now wearing heels.
When Josh and Whitney are in the vent above the necklace's vault, it is obvious that a regular household box fan was used as a prop at the end of the vent corridor behind them instead of an industrial commercial propeller fan.
When Whitney and Josh are talking on the steps outside at the 1hr 59m mark, Whitney starts with 3 small hoops in her ears. Later it changes to a single large hoop.