Stephen Jackson: If I Ever See Rihanna ... It's On

Drake, Chris Brown, and Travis Scott make room ... former NBA player Stephen Jackson's got a hankering for some Rihanna ... promising to get "real aggressive" if he ever runs into the pop star.

Jackson was at LAX when we asked him if he ever got starstruck while playing in front of some of the huge stars that come to watch NBA basketball games.

SJ says it's not really his personality to be star struck ... but that there is one huge star who he'd love to meet and put in some work, work, work, work, work with.