All the Frozen songs are great, but I love Olaf so "In Summer" has a special place in my heart and a very close 2nd would be "Do You Want To Build A Snowman?"
Frozen is my favorite of the Disney Movies so I can't go wrong with listening to any of the songs from the movie. If I did have to choose the best one it would be "In Summer" mostly because Olaf is so cool and he is my favorite character in the entire movie.
I think they did a great job with music for this movie overall. I'd have to vote for Let it Go for most emotional - I still tear up sometimes when I hear it. After that, Do You Want to Build a Snowman? Of course, with kids I heard these songs multiple times daily. Now we're down to multiple times weekly.
"In Summer" is my favorite for laughs while "Do You Want A Build A Snowman" is more an emotional song. The all around favorite though would have to be "The First Time In Forever".
I am soooo freaking disappointed that Reindeer Remix got cut before Jonathan Groff had a chance to record it. Seriously search "reindeer remix frozen" on youtube. Would have been such an better end credits song than what Lovato gave us...or I guess it could have followed it if absolutely necessary. (Anyone up for kidnapping Groff to make him record it? )