Psa 148:1 Praise ye the LORD. Praise ye the LORD from the heavens: praise him in the heights.
The next verses tell use who - and what - should be praising the Lord. Then, we get to "Why?"
Psa 148:13 Let them praise the name of the LORD: for his name alone is excellent; his glory is above the earth and heaven.
Consider this - all of His creation is capable of giving Him praise. Jesus gave us an example when He was told to quiet the multitudes praising Him:
Luk 19:40 And he answered and said unto them, I tell you that, if these should hold their peace, the stones would immediately cry out.
Do not stay silent.