Disney is celebrating the digital release of OLAF’S FROZEN ADVENTURE starring the voice cast of Josh Gad, Idina Menzel, Kristen Bell and Jonathan Groff. The digital copy of Olaf’s Frozen Adventure will also add six classic Disney shorts to your holiday digital collection. Take a look at the special Olaf clip below as well as a video of some of the Easter Eggs hidden in this special holiday featurette. In Walt Disney Animation Studios’ 21-minute featurette “Olaf’s Frozen Adventure,” Olaf (voice of Josh Gad)…