MTV's Justina Valentine stopped by TMZ's "Previously On..." podcast studio to break down the bombshell cancellation of the network's reality show "Ridiculousness" ... and she tells us she just hopes this decision doesn't put her own show up next on the chopping block.

The rapping reality star -- who sweeps the floor on MTV's "Wild 'N Out" rap battle reality show -- called the recent move "an end of an era" for the network ... pointing out the show has been one of MTV’s most consistent staples for years, alongside her own network gem. Gallery Launch Gallery Getty

Catch the clip ... Valentine says she's had the honor to be a part of many MTV legacy shows -- jokingly saying she missed the mark for "16 and Pregnant" -- but "Ridiculousness" was one of the hit shows with t

See Full Page