What are some songs with a great beat that makes you want to dance?

I am looking for songs that I can jam to, and if I have guests over, I
can turn up the music to make them want to dance. Here are examples of
some songs I know of.

"Knock You Down" - Keri Hilson
"2012'' - Jay Sean
"Friday" - Done by GLEE, not Rebecca Black
"Pretty Girls" - Iyaz
"Double Vision" - 3oh!3

Additionally, I'm also looking for songs with just a GREAT beat in
general. You dont have to dance to it. I understand that most
Americans dislike Justin Bieber. But his song "PRAY" has one of the
best beats I've heard in a long time. I'm looking for more music like
that.

Here are some additional examples of other songs that have good beats
that I'm looking for.

"Fallen" - Jason Derulo
"Mad" - Ne-yo
"Drowning" - Backstreet boys

When looking at future answers, I will be picking the answer that has
the most songs I like that bests answers this question. I could really
use a new playlist. Thanks guys :)