'Frozen' is turning out to be Disney's biggest triumph. There are so many reasons for its success, is Olaf The Snowman the biggest box-office pull? The songs have also been on constant repeat on most of the world's players.

The 'Frozen' OST (original soundtrack) is still on the top of the Billboard charts. From Billboard.com: "'Frozen' is the fourth animated film soundtrack to reach No. 1 in the chart's 58-year history."

The hit song "Let It Go" is also nominated for Best Song at the Academy Awards and it is the clear favorite among the field.

The songs are just one of the reasons behind the success of "Frozen." For some viewers, it's the scene-stealing brilliance of Olaf The Snowman, played excellently by Josh Gad. From Roanoke.com:

"The real reason 'Frozen' is a hit, in my opinion, is much simpler than those topics. 'Frozen' is huge because Olaf the snowman delivers. Following in the snowy footprints of such classic Disney sidekicks as Jiminy Cricket, Balloo and Sebastian, Olaf is more than just comic relief. The character, voiced hilariously and sweetly by Josh Gad from the Tony-winning 'The Book of Mormon,' steals the movie."

From The Vulture: "Olaf is adorable, and his dim antics are genuinely funny: "In Summer," his song fantasizing about all the fun he'd have in warm weather, oblivious to the reality that he would melt, is wonderfully witty. ("The hot and the cold are both so intense / put 'em together, it just makes sense!") And Gad brings just the right amount of wide-eyed enthusiasm to the voice of a character who doesn't know anything about the world, but is eager to discover it, to a fault."

There are also many reasons for its successful run which is about to reach Finding Nemo at number 4 on all-time animated Box-office list (Box Office Mojo).

The fact that there are two princesses, Anna and Elsa, with two different personalities is also a draw, where twice as many young girls can relate. Yet, Disney was careful not to market the movie as a princess-centric flick. The title is "Frozen," not "Anna and Elsa" or The Snow Queen (Hans Christian Andersen tale on which it was based) just like "Tangled" was not titled "Rapunzel." This measure was sought to avoid alienating the boys. It seems to have worked!