Fabolous '90s Flashback With Diddy and Faith

11/19/2015 4:16 PM PST

Fabolous: '90s Flashback with Diddy and Faith Evans

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Fabolous took it way back to the '90s for his 38th birthday party by celebrating with his pals ... who also happened to crank out huge hits from that era.

Faith Evans, 112 and Diddy -- who, of course, teamed up in '97 for "I'll Be Missing You" -- were all on the guest list ... and Diddy even got on the mic for a hip-hop take on "Happy Birthday."

Ty Dolla SignSwizz Beatz and many more celebs got onstage before the night was over. F-A-B's clearly got a thang for the 90s, since he went with the same theme last year on his bday.