Unlike all the other parashot (weekly portions) in the Torah, Parashat Ha'azinu is actually a shira - a song, a poem. But it's also unlike the song Am Yisrael (the People of Israel) sang on the sea at Kriyat Yam Suf (the splitting of the Sea), where out of great excitement, relief and joy Am Yisrael burst out singing.

What makes this a shira? Why is Moshe's (Moses) last speech to Am Yisrael as a nation a shira? What's so special about a shira?