ZingB

Ja Rule has made his services widely available to the general public -- the dude's offering up private party bookings now ... something his old foe, 50 Cent, finds awfully hilarious.

The rapper made an appearance this weekend at a private house party in New Jersey, where it looks like he was hired by a bunch of hotties to perform a few hit songs and hang out for a bit. One classic jam of his that he got around to playing ... "I'm Real," featuring J Lo.

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