Floyd Mayweather ain't no Swiftie, and he ain't no Ariana Grande or Selena Gomez fan either -- that much he made clear in an interview with a puppet.

Floyd sat down outside his strip club, Girl Collection, with the puppet Diego from YouTube's "Awkward Puppets" series. Diego lobbed up a bunch of pop trivia questions for the champ, but total softballs ... like what's your favorite Taylor Swift song?

Hard to tell if he's kidding -- y'know, 'cause he's talking to a puppet. He did show love for one singer ... naturally. But definitely NOT Fifth Harmony. Sorry, girls.