Jason Derulo's bringing content direct to his fans ... whether via Instagram Live or literally on the streets of Los Angeles!

Glassboro police said charges against the flash mob's alleged organizers are "a cautionary example" for troublemakers.

Check it out ... Derulo and about 10 other dancers take over the block -- with staffers keeping the crowd from walking into ...

Three teenagers, one of them a juvenile, have been charged in connection with a pop-up party that created a chaotic scene in Glassboro. The suspects allegedly made a digital flyer to promote a June 29 ...