DJ Paul Reveals Travis Barker Coachella Cameo for Three 6 Mafia Set

Three 6 Mafia's DJ Paul is stoked for his group's upcoming Coachella appearance, and fans of Travis Barker should be too -- because he's joining them onstage!!!

TMZ Hip Hop caught up with DJ Paul at LAX this week, and the desert excursion will be a first for him -- he was unaware he'd be playing for both weekends at first -- but it'll be double the fun ... and double the payday!!!

The Memphis-born hip hop legend reveals to us that they'll have several special collaborators pop up during their set, including Travis Barker -- who will also be paired with a mystery guest who has a logical connection with the legendary drummer.

It could be Trav's red-hot rookie rapper daughter Alabama ... could be his longtime punk-pal Yelawolf ... we'll just have to wait for the Three 6 Mafia Coachella set on Friday!!!