VIDEO: FROZEN's Robert & Kristen Lopez Perform, Talk Writing Process at D23 Expo

Songwriters Robert Lopez and Kristen Anderson-Lopez perform the song "Love is an Open Door" from the smash hit movie FROZEN at the Frozen FANdemonium event at this weekend's D23 Expo 2015. Later, the songwriters talk about the unused Frozen demo song "You're You" and discuss why it didn't make it into the movie and perform the birthday song "Making Today a Perfect Day" from the short "Frozen Fever". And, the talented writing duo bring out their daughter Annie to perform "Fixer Upper".

Watch all the clips below!

ABOUT "FROZEN"

"Frozen" won two Academy Awards® (best animated film and best original song with "Let It Go") and a Golden Globe® (best animated feature film). It is the fifth highest grossing film of all time and the highest grossing animated film earning more than $1.27 billion globally. Released wide domestically on Nov. 27, 2013, "Frozen" posted the No. 1 industry all-time THANKSGIVING debut and Walt Disney Animation Studios' biggest opening ever. The film's Feb. 25 digital debut was the biggest digital release (sell-through) ever; it's Blu-ray/DVD release on March 18 was No. 1 on the Nielsen overall disc charts for eight nonconsecutive weeks.

The "Frozen" soundtrack is the top-selling album of 2014 to date and spent 33 weeks in the top 5 on the Billboard 200 chart, including 13 weeks at No. 1. It is certified triple Platinum, selling more than 3.6 million units. The "Let It Go" film clip from "Frozen" has been viewed over 370 million times on YouTube. Topping the National Retail Federation's Hot Holiday Toys survey, "Frozen" product popularity continues to soar: more than 3 million role-play dresses have been sold in NORTH AMERICA alone, the "Disney Karaoke: Frozen" app reached No.1 on the iPad Entertainment Downloads category in more than 100 countries, and Random House's "Frozen: The Junior Novelization" has been on the New York Times best sellers list for 41 weeks.