Benzino doesn't appear to have been able to lure 50 Cent into a boxing ring, so he's settling for the next best opponent ... and, apparently, that's Aaron Carter.
Damon Feldman of Celebrity Boxing tells TMZ ... the former pop star is lacing up his gloves again this summer to fight the "Love & Hip Hop" star in the main event. We're told both contracts have been signed ... and they're slugging it out on June 11.