Hidden Easter Eggs In Frozen
The following is a disclaimer at the end of the credits.
Repunzel and Flynn Rider from the Disney movie "Tangled" can be seen while Anna sings For The First Time In Forever.
REPURPOSED PAINTING – Artist Lisa Keene’s painting—completed during the development phase of “Tangled” and based on “The Swing” by Jean-Honoré Fragonard—made such an impression on “Frozen” filmmakers, it became part of Anna’s signature song, “For the First Time in Forever,” when she leaps into the air and mimics the painting’s pose.
The chocolates on this plate which can be seen while Anna sings For The First Time In Forever look like the ones featured in "Sugar Rush" (A game for the Disney movie Wreck It Ralph).
If you squint really hard on the shelf of "Wandering Oaken's Trading Post", hidden amongst books on the lower shelf, you will find the most iconic disney easter egg. MICKEY MOUSE!
In the courtyard before Elsa's coronation you can see a cameo of Princess Tiana From Princess and The Frog.